The greatest OS in computer history.
Well, I'll agree that until about 2012 I felt that XP was the greated Windows OS in history.
After Win7 got SP1, it became my favorite Windows, and so it has remained. Considerably more stable under load than XP, in my experience anyway.
But the greatest OS in computer history? That covers a LOT of ground...
You really must play around with some of the newer Linux distro's. My Win7 'puter doubled its speed by just loading Linux Zorin and it acts so much like Win7 there was hardly any learning curve and the "Wine" emulator runs Windows programs but since it also came pre-loaded with LibreOffice to replace MS Office and Gimp to replace Photoshop or just think of it as Paint on steroids; there was no need to install more than a couple of free Win programs I happen to like. A bulk photo resizing program (Mihov) and an app that changes the camera photos name to the date and time (Namexif).
Not having to concern myself with the latest MS virus/malware is kinda cool too.
Don't get me wrong, I like Windows, but geez they're so vulnerable and bloated plus all the programming commands keep the CPU's hoping a lot more than they need to thus slowing down the system for the user. I've often wondered why MS didn't take some ques from Linux and lean out their OS's for speed and reliability. I get they are targeted by hackers more than any other OS but they should be able to make their OS leaner. If Linus Torvalds could do it in a dorm room back in the early 90's with no budget at all; MS should be able to do it with their billions and their teams of assets. Linus didn't reinvent the wheel; he took his inspiration from Unix then made it open source. Linux could have been the Windows killer but he chose, and still does, to keep it open source. He still oversees all distro's. I think I read somewhere that Debian was his fave.
Anyway; pardon me if I'm stepping on any toes. I, as a previous MS certified tech, understand loyalty to a brand.