Hmm.. empires have to fall before they are replaced right?
I do not think companies that have "replace Facebook", or something similar, as their mission statement are going to succeed. You have to find what makes your group great.
Julia:
- has reflection and speed
- awesome unique project https://fluxml.ai/Zygote.jl/
Rust:
- idiot proofed manual memory management.
- awesome unique (for now) project https://github.com/egraphs-good/egg
Julia's system is already going to competed with by Python's Myia. But Julia has a natural advantage of naturally being better designed for speed. So I can see it surviving.
More so differentiating instead of just surviving.
It is kind of like how Tensorflow is faster than PyTorch, but Pytorch is more adaptable at runtime. So it is more of a visible tradeoff.
Rust's Egg, on the other hand, is probably going to be pushed back down by something in C or C++. There is nothing Rust can really do about this.
C++ still keeps a 0 overhead principle, and C is just simpler to work with. These are still languages taught to people in school, as a minor requirement for getting a degree. So there exist competent C/C++ programmers to do the job.