Edge is starting to use Chrome add-ons, but they have to be submitted to the Windows Store. So, yet another place to update the app, and I don't believe they can be side-loaded like uBlock:O typically does.

Careful, most only remove the div/object from sight, they don't stop them from actually downloading.

Then how come this Signature Edition issue only arose with this specific device and not other Signature Edition laptops?

There is no Windows Signature Edition OS. It's a device standard that OEM's agree to not pre-install bloatware and ensure that the hardware will not be throttled down.
Microsoft only demands that the hardware runs at its full potential, so that's why bits of the BIOS were locked. Intel/Lenovo developed a new SATA controller firmware that hasn't been included in any install media yet. This is akin to the Skylake support issues that Microsoft is also having.
Dell even has a page dedicated to ensuring people can re-install 7 on their devices that Microsoft doesn't include drivers for in their install media. http://www.dell.com/support/ar...
This is the exact similar issue that Lenovo is having right now, but their 3rd party support reps (that the original guy from reddit spoke to) do not have the full documentation in their scripts to handle this.

It's not the disk itself, it's the controller between the disk and the rest of the system.

Everything about this points to Lenovo lying. Considering Windows even has issues when trying to install on these systems, it seems more Lenovo/Intel as opposed to Microsoft.

That's exactly what this is. Unless you have Windows media that includes this driver baked into it, you won't be able to install Windows. The RAID driver is newer than the available Windows ISOs, therefore it's not included yet.

https://www.reddit.com/r/linux...
and
https://www.reddit.com/r/linux...

So says a 3rd party support tech that is only reading the script Lenovo gave them. This is the equivalent of Geek Squad telling you that you can't install a 3rd party ROM on your Android device because there isn't an option for it in "Settings".

Except, it's not Microsoft doing this. If you were to try and re-install Windows, it would give a driver error as well. It's a Lenovo issue through-and-through.

Except, it's not Microsoft doing this. If you were to try and re-install Windows, it would give a driver error as well. It's a Lenovo issue through-and-through.

If you look at the title, he's complaining about Microsoft, not Lenovo.

It also prevents Windows from being installed. Funny...

This is the same solution for Windows 10, but when Apple does it, it's ok?