I feel like FreeDOS could already run just about everything for 20 years or longer. If your goal is to run DOS software your use case was probably already adequ

I feel like FreeDOS could already run just about everything for 20 years or longer. If your goal is to run DOS software your use case was probably already adequately covered with free software. An interesting thing about DOS is the OS wasn't very involved. Programs did a lot of things we now think of as the realm of an OS, like talking directly to I/O addresses or installing interrupt handlers. I feel like a DOS implementation doesn't even need to do a lot of things, maybe part of why DOS4 is "good enough".