I have 3.

1. Dakboard above the fridge shows calendar and shared photo album. It also runs bluetooth and serves as a relay for Homeassitant and a few kitchen devices (ie: igrill mini probe for meat).

2. pikvm for a desktop

3. pikvm+ kvm for lab rack esxi servers.

the latter two also run tailscale and allow me to SSH proxy if needed as a back VPN/remote access utility.