I don't really know what I'm going to do when they fuck up Windows 7 just as badly [as Windows 10] or try to [deprecate] it, but I'll cross that bridge when I come to it.
You're at that bridge right now. It's time to start switching to Linux, while you still have some breathing room, and not wait until you're in a crisis.
Windows 7 is already deprecated, though support hasn't been complete pulled yet (but all the copies of Windows 7 that will ever be provided to retailers are already in play). And ReactOS will NEVER reach API parity with Windows 7/10+. WINE has been chasing the Windows API for decades, with spotty success at best.
I switched to Linux full time back in 1999, and haven't used Windows at home since then. I weathered the ups and downs of my transition, learning as I went along, but it didn't take long before the Linux way (I settled on Kubuntu) of doing things seemed more natural than the Windows way of doing things.
But I didn't wait until I was at a do-or-die confrontation with life. I switched while I still had plenty of time to learn my new surroundings. This is where you are right now. Don't wait until you are under pressure. Start now by using the same Free and Open Source Software on Windows as you will be using under Linux (to the extent that it is available on Windows). Then, when you switch, you won't be under extreme pressure to replace your software and operating system at the same time.