I used Nannou for several months, it's actually how I got into creative coding and was my first real foray into Rust. I didn't find the compilation time to be a huge issue for me, but I did find the strictness of Rust to be a problem. Creative coding for me evolved into making beautiful (to me) visual patterns with code. I had no interest in understanding or fixing a mutable shared value because this code was meant to exist for only a few moments, not to power an enterprise system.I eventually moved on to OPENRNDR [1] which I loved, but these days I just use TypeScript.
[1] https://openrndr.org/