I did briefly look at JuliaInterpreter.jl and if something like that can be used for general purpose, the TTFX would be fixed, the complaints would stop and I'd wager Julia would gain a lot in popularity. I really hope it happens.

For now the interpreter seems to focus on debugging, and if I understand correctly, it can't be really used to e.g. speed up imports or to specify hot code to be AOT'd/JITed?