I would have been more interested if he'd spoken about improvements actually in the Ruby world.

There fast JITS like YJIT, ZJIT, JRuby and TruffleRuby.

We also have static typing with RBS and an AOT compiler in Spinel and we have embeddable Crystal.

The speed of TruflleRuby or Spinal with RBS isn't that far behind Go.

And here's a Ruby advantage for you, Ruby even with static typing needs fewer tokens from your context window to represent the same solution as verbose Go.

DHH's own pitch for HotWire was that it allowed a native like experience without having to bow to Apple app store review process. Where's that gone?

There's lots of positive things that DHH could have spoken of but didn't.