Rust ownership and async have been the worst part of my Rust experience. I normally either use a reference or copy and that solves 90% of my problems.

Rust prides itself on "fearless concurrency" but as I said, async is horrific. I've spent way too much time trying to build an pipeline that downloads data from a source and spreads it out to multiple consumers who can also pass data on or terminate gracefully. The experience left me so annoyed that I just moved to a worker based model with Kafka in between and let every worker download the file to do its processing. So much simpler.

Having to do shit concurrently in rust is amongst my biggest fears because of async. I'd rather use python or even JavaScript which have functional and easy async.