As far as Nextcloud plugins go, aside from Memories I just run the basics such as Contacts. I sync Joplin notes through it & it all syncs to 2 x desktops & a mobile. For me the Pi5 8GB with NVMe is plenty fast enough for Nextcloud & it's proved to be stable. I run it through Docker via Portainer. This device is also running Kopia for snapshot backups, reverse proxy & Linkwarden.

The EQ14 is running Docker, Portainer, Kopia & about 5 other self hosted apps, the most processor hungry of them being Immich & Paperless. I haven't tested against my Pi5 setup but its anecdotally massively faster & more stable than the Pi4B 4GB that I initially deployed Immich on. The Pi4 was really slow processing more than a few images at a time & sometimes crashed whereas the EQ14 doesn't blink adding say 100 images at a time, processes face recognition etc much faster too & has never crashed. Immich was the driving factor for me to upgrade to the EQ14 & its been great. It also chews through manual backups of Paperless documents in a fraction of the time that it took my Pi4B.

The EQ14 would have no issue whatsoever running Nextcloud. I'll be adding more self host stuff to it once I find anything else I think will be useful!