The person in charge of Mojo was previously in charge of a massive effort to give tensorflow a new backend, for which he conveniently picked Swift (a language he was also involved in), despite there being better options, only to abandon it halfway through because it was intractable and Swift wasn’t ready/willing to support the compiler changes needed, so he just abandoned it, and now works on Mojo.

It gives real “Jony Ive leaving Apple to go work somewhere where nobody can tell him ‘no’ “ vibes.

You don't consider developing llvm as an accomplisment?