Anyhow, yeah, sorry for my rambling. Be careful with your head and carpe diem and all that!
PS: Keep doing fun and challenging things as far as possible. I happened to dance 3 to 4 days a week before; am back to 1 to 2 days now except for Corona measures getting in the way these last years. Think that can help exercise your brain in many ways. Also working and speaking different languages etc.
Vendors aren't going to write drivers for your hobby kernel. No one is using your hobby kernel. Bootstrapping a new kernel without billions of dollars to invest in development time is almost impossible, and anyone who is investing billions of dollars is likely going to have dubious proprietary reasons for doing so.
A successful kernel is Rust is probably the worst thing that could happen to the open source community.