I have a lot of domains on my lists, I imported quite a few. So to be fair I may be the one causing the issues.

I may just disable the ones I imported for a while and see if anything changes.

Looking at the screenshots, it looks like you can manage some lists and apply block and allows.

But yes, what is the difference? He literally says NextDNS is basically a Saas Pi-Hole.

Sounds like this is just an advert for NextDNS. Who keeps breaking their Pi-Hole and how?