Indeed, they’re probably shipping a backtrace symboliser, and since there’s no system-wide equivalent of libc to link against, they’ll be including the entire Rust standard library with the binary too.

My other hunch is the Krisp noise cancellation ML model is a huge chunk of the memory footprint.

I once played around with reverse engineering a Rust program. I compiled the optimized version of the standard "hello world" program which somehow turned into 50,000 lines of assembly.

It looked like it copied over dozens of functions from libc and the data section was filled with every single possible error string "file not found", "connection timed out", etc. as if there was a possibility of hello world generating an access denied error.