I just filled out the Rust survey [1] and may have done both—iirc there were checkboxes for missing features and concerns the language is getting too complicated. It's a hard balance to find.

[1] https://blog.rust-lang.org/2023/12/18/survey-launch.html

Depending on the scenario, I don’t hear mutual exclusion there.

It can be moving too slow on important things, and too fast on unimportant or volatile things.