[gavinray]

I don't think the Free Pascal IDE is related to this

If you check the website demos and the "dos.h" source on GitHub, this is a library for making GUI apps whose UI has the appearance of being made with MS-DOS.

Unless I am misunderstanding the connection you're trying to make, which is also possible

[djur]

It's related in the sense of both having an appeal to DOS nostalgia.