I used to be a diehard Windows user. I was even a contractor on Longhorn for Microsoft and I have a DLL I wrote that still ships in the System32 folder (it used to be two but I don't see that one in the System32 folder now in Windows 10). I used to be proud that I could walk up to any PC in a store and hit a key combo and tell me kids "I wrote that" when the Narrator window popped up.
I still run Windows 10 on my old personal laptop just to run Quicken/Quickbooks but my current side-project is an app to replace both of those with a single app. I'm looking forward to the day I can wipe Windows off that laptop and install Ubuntu (or maybe ElementaryOS as I've heard good things).
Goodbye Windows.