I switched from Nextcloud Photos to Nextcloud Memories to Immich. I submitted a patch [1] to Immich to make it possible to directly login via (Nextcloud) OIDC which, in combination with the Nextcloud 'External Sites' app makes it possible to integrate Immich directly into Nextcloud. I do not automatically add all photo and video material synced to Nextcloud into Immich yet, relying on a set of scripts I've been using for years to maintain all our media in a single repository. It should be possible to either use Nextcloud to sync media which is then shown in Immich through its 'External Libraries' feature (this is how I use it) as well as to use Immich to sync media and access it that way. No matter how it is used Immich can be integrated to be as easily accessible as any 'native' Nextcloud app. Performance is far better than Nextcloud Memories, this was my main reason for moving away from the latter. The search and facial recognition features in Immich do not require a server with GPU access, performance is fine on my by now rather aged DL380 G7.

[1] https://github.com/immich-app/immich/pull/18763/commits/fe7a...