Rust and esp32 was a rough ride for setup. The pthread rwlock thing stumped me for a while because I missed `esp_idf_sys::link_patches()` in main. I eventually found that missing piece and got it going.

It's hard to tell which MCU is pulling ahead for me. Rust/esp32 is so new it's not even merged to mainline llvm and I'm constantly updating esp-* libraries. OTOH, AVR/Arduino has been "just working" for me except you're stuck on a Rust build that's over a year old now due to a bug.

And then both architectures seem to suffer a bit because I stuff all the toolchains in a container, lest they explode all over the filesystem. But then VSCode can't really autocomplete anymore since it doesn't have all the pieces.

That all said, they're both super fun and it's nice to see things moving along.