I mainly like Ren'Py because it's simple and cross-platform by default, so I can use it on my Linux PC without any effort. Any other engines, it's rare they have built-in support for non-Windows machines, or unlikely the dev decides to enable Linux support or create a Linux build. Yes, I can use...
Absolutely one of my fav games. I don't know what it is that draws me, because most people have big tits and I'm not a fan of that, but something about the renders, the story, the personality of the characters, it's just so well done.
That's not an alike comparison at all, considering DX12 vs DX9 and Windows XP are about outdated technologies, so of course I wouldn't expect developers to support them. However, Linux is a modern OS just like Windows, and Ren'Py has built-in support for it, and even has it selected by default...
I made the more traditional "pc" build instead of just a Windows build: gofile.io/d/VEWBiS
Hopefully people will stop excluding Linux in their Ren'Py games, since by default it selects "PC: Windows and Linux" in the SDK