I've been using Odin for about 6 months now, and to be honest, it's hard to find fault with it. I've used it for STM32 microcontroller firmware, web and desktop applications, and all are performant and compile quickly.
My one issue is (and I'm fully aware it will never happen) I do wish there was some sort of first-class solution to inheritance. I've grown to love procedural programming, but some problems really are just better solved with a more OOP approach. Just because classes exist does not mean they need to be used.
But as far as a language to "get stuff done" with as few tradeoffs as possible, Odin is about as good as I can imagine a language being.
I'd like to hear more about Odin + STM32 MCU firmware, do you have any good resources? I'm also curious how difficult it may be to using it with ESP32 (ESP-IDF) / RP2350.