If I recall, I was inspired by this:

https://www.tumfatig.net/2022/ads-blocking-with-openbsd-unbo...

I ran Pi-hole along with my OpenBSD router running unbound for some period. Then I realized I can download the same entries used for Pi-hole, AdGuard, uBlock, etc. I created a simple script that generates an unbound configuration that I can include in my unbound.conf file.

One advantage over Pi-hole I noticed is I can return NXDOMAIN which makes more sense to me. I didn't see how I had that option with Pi-hole.

I just checked, and the generated unbound configuration comes in at 218000 lines, so takes a moment on my Celeron J3060 class router when loading unbound.

I encourage anyone to follow the "install your first package" instructions, but pick a real scientific package like WRF or GROMACS. Be prepared to wait a while though...