Pihole good - you don't need umbrel to run it. I've had PiHole running on a raspi zero since they were actually $5 chips.
Discussion
Yes, but...
I'm not going to buy a bunch of PIs to run specific things. I kinda absolutely hate that, plus, I don't know enough networking stuff to manage the 5+ I would need to do various things. Nor do I want to learn.
lol pihole fucked up my ability to login to my both of my home network routers…
Oh geez...
Yeah this is why I like to run ip blockers on the actual Machines that need protection & not on the network level…