crates.io sees about 13% of requests from nightly compilers, although that may be biased by CI tests that just check for future compatibility rather than needi

crates.io sees about 13% of requests from nightly compilers, although that may be biased by CI tests that just check for future compatibility rather than needing nightly features. https://lib.rs/stats#rustc-usage https://lib.rs/stats#rustc-usage For application development nightly hasn't been necessary for many years now. Places where people use nightly are increasingly just nice to haves and small optimizations.