I think there have been advancements in RL that deserve to be on this list. AlphaFold at the very least; I hope you had the pleasure of reading the reactions of researchers who work on protein structure determination and how stunned they were that their field of research had been in large part solved.

Here's a few more that come to mind:

- Work decoding brain signals that allowed paralyzed people to communicate via a computer (this all happened pre Neuralink)

- I think self-driving cars fit your criteria, even if the jury is still out as to whether this has/will soon be 'solved.'

- In gaming, Unreal Engine's Nanite is very impressive and a real technological innovation

- There are efforts to get LLMs to learn via RL and not just from training on huge text corpuses. Actually mathematics is a prime example where you might dream of getting superhuman performance this way. People are at least trying to do this.

Just because there's a lot of BS which tends to drown everything else out, doesn't mean there isn't real progress too.