Nobody truly knows, but as an outsider what's really infuriating for me is the tunnel-visioned nature of ML/DL research and investments. Especially money-wise, practically no other techniques are getting even 1% of the funding so it seems that ML/DL is some sort of a local maxima that we can't seem to crawl out of.

IMO the path to a better AI very likely is tightly bound to ML/DL but to me it's obvious that they by themselves are not it. It's very likely a combination of techniques, ML/DL included.

No one knows. We need to do more basic research to figure that out.

My guess is that it will take large scale quantum computing. But that's just speculation, I don't have any proof.

brains in jars.