I have no time for or interest in proprietary compilers. The standard library is Apache 2, but the license link on their home page is to a long terms of service thing. I’d like to be wrong because it looks interesting. Until then, this doesn’t exist in my world.

I bet that’s true for a great many people. There are too many wonderful FOSS languages to bother with one you can’t fix or adapt or share.

As someone who would have strong reasons to invest time in Modular (simple high performant language for implementing bioinformatics scripts), I would say primarily the worry that development might be too tied to Modular, the startup behind it, which eventually might pivot into other priorities.

One would want to see either a strong community build up around it, or really hard evidence for a long-term commitment to the language from Modular. And the latter will take a long time to be assured of I think.

Also, editing tools need to catch up before very wide adoption of a language with a lot of new syntax.

Mojo is still NOT open source (the standard library is but not the compiler). Open source is table stakes for a modern programming language.

- Doesn't support Windows, which is what many companies give their employees, outside Silicon Valey like culture

- The MLIR approach, which was also designed by Chris Lattner while at Google, has proven quite valuable to create Python JIT DSL

- The Python ecosystem now being taken seriously by the main GPU vendors, thanks to MLIR, as all their proprietary compilers are based out of LLVM

- Others remember Swift for Tensorflow

When it was announced it was not generally available for everyone to try out. There was a waitlist phase.