If GPL ceases to be used (which seems extremely unlikely since it's the most popular software licence) then perhaps you could state that his ideas are obsolete

If GPL ceases to be used (which seems extremely unlikely since it's the most popular software licence) then perhaps you could state that his ideas are obsolete and irrelevant. I do not share Stallman's view regarding proprietary software (although I can see where he comes from given the printer-driver which inspired him to craft GPL) but I certainly see the value of a licence which enforces source code availability of distributed derivates, both practically and ideologically, just as I see the value of licences such as BSD/MIT. As for his predictions regarding the 'tech-world' they have unfortunately been very accurate with software patents posing as the biggest threath to both open/closed source development just as he predicted back in 1996 (if not earlier). Add to this the increased widespread use of computer 'gadgets' and their locked-down functionality. As such I think his views of the tech world is more relevant than ever, despite not fully agreeing with it.