>Firstly, hard drive space isn't the only reason to make binaries small - you have RAM pressure, cache pressure, and bandwidth to save.

FWIW, this is does not seem to be empirically true. The savings are possible in theory, but false in practice.

https://drewdevault.com/dynlib.html

The most used largest libraries, like libc and libpthread, would be dynamically linked by Rust anyways.