My picture folder contains 1,4 TB of data, with many RAW-files and some Videos. Memories is handling that without a problem. I especially like the way it handles RAW-files, by grouping them together with the fitting JPEG.

I don’t know about how ressource heavy it is, but my server is really nothing special.

Features I like and use:

• automatic and manual people recognition
• sorting it on a map according to the geo data
• most used: Timeline, sorted by date. I barely organize my photos in folders now, because the timeline-sorting is what I want and enjoy.
• Albums to share fotos with family and friends. They don’t need a Nextcloud-Account to access them.

If you already use Nextcloud, try the Memorie-Extension. It has all the features of Immich. The tagging-feature for faces has been there for at least the year I am using it now.