I have a Pi3 running pihole/dhcp for my home network, and 4 Pis as part of my home k3s cluster (along with 3 cheapo nucs). Yes it's overkill but I'm in infra and I learn a lot from it.
The cluster runs nextcloud, collabora, plex, longhorn storage, deluge, nzbget, some custom projects I built to sync my bank accounts with my finance software and to sync photos from Signal chats to my nixplay frames, backups for my NAS, Grafana/Prometheus/Loki, netdata, etc.
I also run an entertainment company and we use a Pi Zero to control our onstage LED lights via presentation remote or wifi as a fallback.
I keep thinking of other things to do with them, but this is already enough to maintain in my "spare time".
The cluster runs nextcloud, collabora, plex, longhorn storage, deluge, nzbget, some custom projects I built to sync my bank accounts with my finance software and to sync photos from Signal chats to my nixplay frames, backups for my NAS, Grafana/Prometheus/Loki, netdata, etc.
I also run an entertainment company and we use a Pi Zero to control our onstage LED lights via presentation remote or wifi as a fallback.
I keep thinking of other things to do with them, but this is already enough to maintain in my "spare time".