Maybe it is interesting for embedded devices, but seems they've lost their purpose. It was never meant for business, but again, what's the point?
I don't see technological, logical, or knowledge progress in the attempt to write complete OS in assembly (anymore). I've done it myself, in high school, just for fun, a 16bit. That is also when MenuetOS came out. Now I spend my time more wisely. I've actually went on doing things that benefit the society the technology and the users.
Not that menuetOS is bad, but I suggest they reorient them selves so that there is that usable part. And I can see space for it, in embedding computing f.i. Far from having no respect for their work, which I have my hands in from day one.
To some the challenge really is all there is. I'm very happy to see some counterculture to the bloatware that is the norm.
This is an amazingly compact and neat hack, it incorporates a very fast and lightweight GUI that can be used for general purpose computers just as easily as for embedded systems.