It's important to learn that alternative doesn't always mean replacement.
There are tons of Google alternatives but probably no Google replacement.
Same for Linux vs. Windows. Linux is a Windows alternative, not a replacement.
So when you look for alternatives, don't expect them to be the same as the product you try to get rid of. It's very unlikely that you get 1:1 the same functionality. Try to learn from scratch.
@sheogorath Huh. I see Linux as checking enough of the boxes to count as a replacement for Windows.