If my personal opinion counts for anything: I think Slava is a first-rate compiler hacker working on a pet language. Somebody should snag him ASAP and put him in charge of something more useful; dunno, a tight compiler for an embedded ARM platform for mobiles or something.
The world didn't need "the best forth-dialect" which he created, and still doesn't. It just needs another standards compliant C compiler. Nvidia or Intel should put an end to his fun-mongering and suit that boy up for a nice Lead FOO Architect position :-)
Slava's very smart, but I think that the basic idea of a 'stack based language' is simply not a great one, because keeping track of the stack in your head is a pain in the ass. So I'd say that mahmud is right on. Worth learning for fun, but it just doesn't strike me as practical.
The world didn't need "the best forth-dialect" which he created, and still doesn't. It just needs another standards compliant C compiler. Nvidia or Intel should put an end to his fun-mongering and suit that boy up for a nice Lead FOO Architect position :-)