That's 2 very different things. Microsoft not-supporting Windows 7 doesn't mean you can't use it. That means it keeps working, you can use it as you always did

That's 2 very different things. Microsoft not-supporting Windows 7 doesn't mean you can't use it. That means it keeps working, you can use it as you always did, but they won't make (and push down your throat) any more patches. A library/app not-supporting a particular OS/version usually means you actually can't use it. And there often is no serious technical reason.