I had jellyfin, arrs, wireguard and a lot more, but adding nextcloud was too much for 4GB. It would start with 2.7 GB used, but building until it OOMs. Also rpi cant transcode, but its perfect for direct play. I upgraded my server to PC version once I had to upgrade storage. Running multiple disks from rpi requires extra cables, devices and then its not cheap small factor anymore :)

Now I have raspberry for 2nd pihole, 2nd wireguard, duckdns, upsnap (WOL) and filebrowser