You were modded troll because "To be honest I have enough trouble leaving Microsoft products at times, although often it's because they are the best at what they do" is incorrect. Nobody would replace the OS that came on their computer unless the replacement was superior, and Linux IS superior. My W7 notebook will be joining the tower in running kubuntu very soon -- Windows gets slower and slower all the time as its registry becomes hugely bloated. It seems uninstalling a program seldom deletes any registry keys; I'm using the Windows AV (can't remember its name) and have uninstalled AVG, yet Windows keeps nagging my to turn AVG on.
Windows lacks features, has to be rebooted monthly, its useability is awful, and it's slow as molasses compared to Linux.
As to "Explorer file manager has no equivalent in terms of speed, functionality and usability compared to anything in Linux", that is PURE troll. Windows file manager was all right in XP but the one in W7 is klunky as hell. I don't remember the name of kubuntu's file manager, but it's heads and shoulders above Windows'.
As to MS Office I'll agree Excel is the best spreadsheet, but Word has few advantages over Oo, and MS Access is one of the reasons I'm glad I retire next year. I miss real DBMS languages like NOMAD and it's little brother dBase. I'm still pissed about what MS did to FoxPro after buying it. It was a great little DBMS before Microsoft bought and ruined it.
And Outlook is the absolute WORST email client I've ever had the misfortune of using. They went all MS a couple of years ago where I work and I miss the Novell email client.
I use MS products at work and absolutely HATE them. Microsoft makes the absolute WORST products of anyone's in my opinion.
You were modded troll because it was a troll. I completely agree with the guy who modded you down.