[racenis]

The oldest computer that I have tried running this engine is a HP laptop from 2008, running a 32-bit version of Windows XP.

It seemed to work fine, but I did have some issues with the Direct3D 9 renderer. The renderer works fine on other computers, so I have no idea if it's a driver bug (Intel tends to have buggy drivers) or if it's a bug on my part.

The biggest problem with using old hardware is drivers. Older drivers will only work on older operating systems and it's difficult to find C++20 compilers that will work on them.

[alexvitkov]

You can use modern MSVC or Clang with an old C runtime/Windows SDK. It's a pain in the ass since new compilers are way stricter with what they compile, so you get a bunch of warnings, but it will work.