The hogged resource for me is disk space. The more recent versions are bundling more and more features like a web-based word processor etc. that are just useless baggage for me. (I do like the calendar and contact sync.) I have a small hosted site with a tiny personal Nextcloud instance, just for sharing a handful of files, plus a small Wordpress site, and I had to upgrade from 500 MB to 1 GB to fit it in and also be able to run the upgrader.
