The fact that the OpenTTD devs made it compatible down to the save files and textures is nothing short of incredible. Like how much time and dedication does that take?
To clear it up I am referring to just the kernel. You can set anything you'd like as PID 1 so we can have a non-unixlike userland. For example, some users set their kernel to boot directly into Emacs, without an init system.
The fact that the OpenTTD devs made it compatible down to the save files and textures is nothing short of incredible. Like how much time and dedication does that take?