Sudo project means more source code == more bugs.
doas is from OpenBSD, less and clean code == less bugs. At least, that is how I see it. I wrote last C code 15+ years back so you might as well ignore my comment ;)
I wonder this because doas seems like it is superior but I rarely see how-to documentation (on Linux, at least) that uses anything aside from sudo (or just su) for privilege escalation.