Full disclosure: I like Windows 7 and they'll take it from me when they pry it from my cold, dead hands.
So, that said, Microsoft has stated that henceforth there is only "Windows" and it's based on "Windows 10" but it's a moving target from now on -- just continuous morphing as more and more updates and patches are downloaded and installed whether you want them or not.
There will be no "Windows 11".
Alternatives? Linux Mint. A Mac. Personally I like CentOS Linux best with OS X second, but Mint is good and I use Ubuntu at work without severe mental damage.
I think the best alternative is:
What the Hell is going on with Microsoft? They seem like Sports Illustrated and the Bruce Jenner thing, it is almost as if they are trying to commit corporate suicide.
I have always used Macs personally, and worked on Windows, and I like Windows 7.
What is going on here?