Which brings back to having a language designed for poor developer experience, given that tooling support cannot be part of the overall experience.

So if for language X, if I as language designer want to provide the same experience as Smalltalk, either I consider the interaction with IDE workflows, or I design command line tooling to go along the language (e.g. Go).

And the command line experience comes back again to the universe where it is more prevalent, POSIXy systems.

So I don't think I am making false assumption here, as one cannot have it both ways.