[ololobus]

I use PiHole, it does break some stuff here and there, and sometimes useful things like Private Relay or iCloud in iOS; or once YouTube history stopped working for me (apparently they use a separate domain to track watched videos and progress!). It also depends on the block lists you upload. It’s pretty easy to unblock, especially web, as you just look on which domain cannot resolve in the browser dev tools and add it to the allow list.

Yet, DNS-based blockers have a limited usefulness at this moment as some major ad-providers started using the same primary domain for serving ads. For example, YouTube, partially Google, Yandex. I guess they cover everything with top level load-balancer and then route internally to specific service ingresses