To be fair, it's much more likely that Julia will be stealing Python's dinner, rather than Rust.
Django is not going to be rewritten in Julia. Neither is Linux going to be rewritten in Python. Different languages have different domains. Some of these comments seem to think all languages is competing in the same domain as if Rust is a direct competitor to Julia or JavaScript.
The context of the comment I replied to was that Python was fantastic glue code _for scientific computing_. Julia won't won't impinge on Django's usage share.
Rust will not steal Pythons dinner, they are used for completely different domains. The comment was saying that Rust might be a realistic alternative to C/C++/Fortran for modules which are not written in Python.
That's not what I said. I said Rust was a good candidate for all the things Python is using to actually do useful work. The underlying libraries written in Fortran, C, and C++.