From what I've seen and heard, you'll get what you paid for.
Terraria Community Forums
Kyouko Tsukino
Ori
Aaahh good one
Kyouko Tsukino
After subjecting my computer to it for a while (bless the ability to install multiple OSs in one computer) I find this image to explain pretty much how things work with Windows 10, or, rather, how they don't:
Ori
Just hope they won't limit directX updates for that operating system...
Scarecrow
at least it seems to have plenty of escape hatches.
Kiddles
I've been on the tech preview for some months now. There's still some stability issues, but it's getting there. Unfortunately, MS still likes to load your start menu with annoying Live tiles. The return of the start menu is nice, but it's not the same as Win7's. Still, it is better than Win8. To sum it up, Win7 > Win10 > Win8/8.1.
Kiddles
Also, the down side is that you're gonna have to upgrade to 10 eventually, since it's the last Windows OS, and Win7 support stops in 2020. Better redeem your free copy so you can upgrade in five years. And no, Win7/8.1 users won't be getting DirectX12. It is exclusive to Win10.