On a properly managed company system, the administrator has turned off the possibility to run executables from removable media.
Easy.

When an office system executes programs from an external USB stick, it is just badly managed by the IT department.

In fact, Windows offers more control over features like this (via group policy) than most other systems.

Today's content providers seem to jump through every possible hoop to defeat caching.
You would think that a video provider would use some indirect URL to first log the access attempt and then point to a static location where the actual video is provided, and that can be cached locally, but no...
In a new deployment, including a caching proxy probably is a waste.
E.g. our existing proxy now has a byte-% hit ratio of 11%, falling all the time.

That is the HBBTV system.

So what you are saying is that today's equipment manufacturers are not as capable as the guys in the past were.
Even with all the CPU power and memory they have available they are not able to code a decently performing system.
They probably have different priorities than a fast and slick result, today.

With a capable design team, it should be possible to design a well working digital broadcast news system, even today.

Yes, and there also still is page 888, isn't it?

It clearly shows that you are being fed shit.
There is no such thing as "Ceefax has to go because analogue tv ends".
It is a decision made for other reasons.

Yes, the cutoff of Ceefax appears to be politically or financially motivated, certainly not technically.
The DVB system for digital TV transmission supports Teletext (Ceefax) just fine.

I think you are discussing implementation in your particular equipment, not features of the system.
When teletext first appeared, its limitation were the same. You could type in a page number and then
you needed to wait some 30 seconds before it appeared in the carroussel and you got it on screen.
But then, TV sets appeared that loaded pages in memory ahead of them being requested. First a limited
system with 4 or 8 "related" pages being loaded, later the entire page repertoire was kept in memory for
instant recall. Apparently you have such a set and teletext is instaneous for you.
But any followup system (that is not interactive) could do the same thing. Apparently your new device
does not have the memory capacity or cleverness to do this, but a better device could be built that operates
the same way as your teletext set.

What all you Britons should know is that there is no technical reason why you don't get Ceefax after the digital switchover.
The digital system has support for TXT and in many other countries, including the Netherlands, the TXT service has remained in
place after digital switchover, which was completed years ago here.
There must be some political or financial reason why your BBC is dropping Ceefax. It has nothing to do with the digital switchover
as it is.

Wait until your boss deletes that important document and your RAID system has deleted it on all drives in the array immediately at his request.

Or your business application is slowly corrupting the database and it is noticed (or finally confirmed) only after 3 weeks of use.

At that time you want to be able to get old data back. This is not something your array is going to be able to provide you.

Of course when someone had deleted half of the data in your finance database and you would notice it on the year or month close, you would already have overwritten all your backup media and lost your data forever.

Some time, someone will come at your desk and ask "I'm sure I had that contract in my documents folder last year but when I look now it has vanished".
At that moment you will realize that your backup rotation scheme is not as clever as you first believed.

I'm not sure how everyone gets so ecstatic about those cloud backups. When we would need to send all our data over the internet connection it would take an unworkable amount of time to complete the backup.
Even to the local LTO-4 drive, which runs at over a gigabit per second, the backup takes an appreciable amount of time.
Cloud backup may be good for a 3-man company doing document editing, but with the amounts of data that are common these days, and the speeds of internet connection that you normally have, I don't see it as a realistic possibility.

RAID is not a replacement for a backup.
RAID will safeguard you against the failure of a single disk (if and only if you monitor the system and replace disks as they fail), but backup will give you back your data as it was before your application destroyed it or your user deleted it. That is something completely different.

What people apparently don't realize is that there are way too many features in PDF to do a quick and dirty viewer.
It will probably work on some simple PDFs created by a "print to PDF" tool, but once you start viewing more advanced PDFs you will be in trouble.
Some time ago we switched from Adobe Reader to a competitor PDF reader where I work, and we still encounter PDFs that view OK in Adobe but fail in the new viewer.
Especially (but not only) PDFs that contain user fillable forms cause trouble.

The experience is much like using another browser than Internet Explorer was 5 years ago.
Often it worked, but frequently you encountered pages that won't render or function correctly.

Well, you have one very simplistic view of "backup"...
I would not talk about crusty old IT departments if I were you...