Comment by epolanski

I always wonder, why not write these games on top of a virtual machine like Carmack started doing in Quake, a usage he then later extended to quake 2 and 3 [1].

I'm ignorant about game development, virtual machines and system programming but from the little I understand it seems a sensible choice to make.

While there is an initial price to pay modeling 99% of the game to be implemented on a user-implemented stack seems a sensible approach to me.

[1] https://fabiensanglard.net/quake3/qvm.php