*Disclaimer - I have never used MenuetOS Regardless of being closed source, I'm going to guess that it would still be highly educational to learn Assembly prog

*Disclaimer - I have never used MenuetOS Regardless of being closed source, I'm going to guess that it would still be highly educational to learn Assembly programming on a system that makes it a first class citizen where you just boot into the OS that already is entirely built around ASM. For really simple stuff, a simple microcontroller might be better, but I'm sure some folks are more interested in building desktop apps.