You can also replace common or shared attributes between your configs using env files: https://docs.docker.com/compose/environment-variables/set-environment-variables/#use-the-env_file-attribute

Things I put there: UIDs, GIDs, TZ, shared mount paths, etc.

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This is the best: https://github.com/sahib/rmlint

mine was really sluggish for a long time, then I saw someone in here explaining their similar issue and their fix. I don’t have the post link, but it was related to DNS settings. Basically for some reason using my pihole dns made only nextcloud sluggish, the fix suggestion was to use 1.1.1.1, which worked. Now, it is a pretty fast nextcloud.