Been running my PiHole on a ZeroPi[1] for many years without issues. Initially it was unstable, but turned out I had been scammed and the USB "charging cable" I had bought at the local electronics store had 1 Ohm resistance. Replaced it with a proper USB cable and it's been rock solid since. So solid I keep forgetting about it in fact.

[1]: https://www.friendlyelec.com/index.php?route=product/product...

It's running on my home server which is a low powered celeron J3120 (I think) on Ubuntu LTS , so possibly that may make a difference, although I've used pis in long term always on other applications and they've been fine but perhaps pihole may be too much for a pi.

For myself I’ve been running pihole on an RPi3 for 7 years and have never had one single issue with it at all. Maybe I’m just lucky I dunno. I’m always surprised when I hear people have issues with it.

I have been running pi-hole on a raspberry for years with no downtime, op is either pitching for the DNS provider or they have not deployed their pi-hole correctly.

My only financial relationship with NextDNS is the $40 I've spent on the service so far. Another comment mentioned turning off query logging since that amount of activity is hard on an SD card, so you may be onto something with deploying it incorrectly

I just run it in a Docker container on my NUC that i upgrade occasionally, no issues for years.