There sure are a lot of updates. I haven't updated to 10. I kept getting notices of a free upload, which I disregarded because I've spent so much time getting Flight Simulator to work on 8.1. Flight Simulator is no longer supported by Windows, so any new version, or updates is not obligated to run Flight Simulator. Eventually, I expect the simulator to not work at all, even with downloadable fixes or work-arounds invented by the Flight Sim Community.
Finally, Windows tricked me into upgrading to 10. Fortunately, it gave me the option to undo the upgrade, but I had to do it within 30 days. I undid it during the first week, when I encountered the first problem with my Flight Sim. But they kept trying to trick me into getting the free windows 10. Some geek eventually came up with an app that prevented the daily badgering from showing up, and I haven't been bothered since.
Windows will stop supporting Windows 8.1, probably in the near future, and I am dreading the day, because most of the updates for 8.1 are to plug holes used by hackers, and I don't like the idea of being exposed to viruses and malware. But I never look forward to having to get the lasted version of Windows every two years. There are some useful bells and whistles you usually get, but also a lot of changes that are more annoying than helpful, like when some software you installed like Microsoft Works Word Processor no longer works, and Microsoft instead wants you to pay for their cloud version every month.
If Flight Simulator ever becomes totally unusable, I'll join the ranks of those using Linux, and be done with Microsoft forever. Microsoft is annoying. I don't like that company very much, in spite of how they have advanced the internet. It's going the way of corporations fucking with the public, and Microsoft seems to want to own the public.