I'd love for there to be some way to start experimenting with it. I understand it still has a long ways to go, but I'd like to get more of a feel for it outside of Jonathan Blow's 4 hour+ work sessions on Youtube.

I understand the likely reason why he isn't, because he doesn't want to have people bugging him for support on it, but if I could sign a "I promise not to email you any questions about it and I'm using this at my own risk, pinky swear" and get access to download the latest version of it, I would.

It looks well and good, but the point remains that it won't help you build for consoles out of the box.

It apparently already builds for Switch: https://www.reddit.com/r/NintendoSwitch/comments/cixsoy/jona...

Let me clarify: Unity gives you high-level APIs for things like graphics, audio, input, networking, that work across all supported platforms automatically. There may be some platform-specific quirks, but roughly speaking, you can just click "build for X" and get a working X build. There's a huge gap between compilation and that.

I don’t know how Jai will do this. But my gut feeling says that the meta programming capabilities will could help doing this sort of thing. My understanding is that it enables one to say „build my program in this particular way“ expressed within Jai itself.

Please correct me if I‘m completely off.

I honestly think this is outside the scope of a language; it's really a library/framework/toolset thing. I'm sure it will be possible to do this with Jai (maybe it already is), but you'd still have to do it with Jai as opposed to Jai doing it.