[mvanveen]

I think this is true if there aren't new questions to be asked. But technologies shift and evolve all of the time.

One of my top StackOverflow questions for years was around the viability of ECMAscript 6. It's now essentially irrelevant because it's found wide adoption in browsers etc. but at the time a lot of people appreciated the question because they wanted to adopt the technology but weren't sure what its maturity was.

It's also true that some technology stacks mature to a point where there isn't much more to be asked but I think there will continue to be a place for forums of discussion where you can ask and get answers around newer, bleeding edge technologies, use cases etc.