There is a question of what benefit would it bring even if its open sourced?

Static python can transpile to mojo. I haven't seen an argument on what concepts can only be expressed in mojo and not static python?

Borrow checker? For sure. But I'm not convinced most people need it.

Mojo therefore is a great intermediate programming language to transpile to. Same level of abstraction as golang and rust.

At this point, it might be moot. Too many people are assuming it's still a closed-source thing and will dismiss it.

Due to the closed source nature, every mojo announcement I see I think "whatever, next"

If the actual intent is to open-source, just do it, dump out whatever you have into a repo, call it 'beta'

I think they should say that on their /opensource/mojo website if that's the plan. Rather, they are trying to gesture at "750k lines of open source code", when that code is only meant to be fed into their closed source MAX engine. That's a sleight of hand, bait and switch misdirection, and that's what feels icky to me.