Can't count in years because for my 9-5 work I use different languages. I started learning C when I was 15, now I'm over 30, and it constantly appears somewhere in my life, whether this is embedded or desktop development. Kernel - occasionally, when I must adapt or implement a device driver. Rust - I had three approaches, all of them related to WinAPI-based programs, but didn't suit my needs. I like it, I will come back to it at some point for sure, but definitely not in the context of Kernel.
