They're a software developer of consumer-grade operating systems and a limited number of applications
Dude, there is an unbelievable amount of mission-critical enterprise software running on Windows, using SQL Server and so on. However, their server products are "boring" and certainly never feature in any Apple vs MS debates, due to the fact that Apple don't seem to make anything you could actually run a big business on. Apple are entirely consumer-focused, hence design being so far at the front of their priorities.
I tend to build my own Windows PCs and I have several that have been on for years with only a few reboots. Because Windows runs on many systems, it's possible to get crappy ones. However, I think you'll find if you spend the amount of money a MacBook Pro costs on a PC laptop, you'll get a nice bit of kit and it will fail about as often (however, I don't consider a $200 repair trivial).
And then don't download a new application and install it every single day. Doing that to either a Mac or a PC is what kills it.
I've used both now, and to me, there's no big deal. It's like using a blue pen vs a black one. The only thing that makes me lean towards Windows is the fact that I can code for it, so if it doesn't do something I want it to do, I can make it.
For anyone else who asks me which they should get, I just say to try them both and see which they prefer. It's a long time since Windows was "the slow OS that crashes a lot".
Anyone that says one is better than the other probably doesn't have enough experience with the one they're trashing. They're both very good indeed.