I'm not an expert but from what I've seen Rust is one of the big alternatives. It's new enough to be trendy and fixed a lot of C++ issues whole being mature eno

I'm not an expert but from what I've seen Rust is one of the big alternatives. It's new enough to be trendy and fixed a lot of C++ issues whole being mature enough that the tooling is ok. I'm also intrigued by Zig. I haven't used it for anything yet but the language looks fun and I believe platform.io supports it Raspberry Pis are beefy enough that you could also get away with less systems-y languages. I like Kotlin. By default Kotlin needs a JVM but I think it's usable if you build native executables. However if you want to fiddle with GPIOs you might have to do it by manually setting things on/off in the filesystem (edit, sorry, just read you're using a PICO. Not sure how well Kotlin is supported)