Lots of snark here, but from following the development vaguely, and looking beyond the marketing speak:

Mojo is aiming to be a state of the art systems language that has Python embedded seemlessly. It's exactly the other way around from numba/Cython which embedd compiled C in performance silos inside Python.

I used to do heavy numba work and this has no relationship to that. Just look at what the devs are actually targeting/implementing right now: Better lifetime/ownership semantics and ergonomics.

This is not in the same universe as numba (or even Julia).

I think it's far too early to tell whether it will be good, but I haven't seen any other approach that resembles it.

Cython at least from my use of it, is very difficult to debug. It's a language inside a language and you easily get lost between all the pyx pyd files. it's not very developer friendly. Mojo/Julia promise a good developer experience

better marketing :))

Or numba.