Wha-huh?

This is the decade where every company bought into flat design, monochrome, chonky whitespace, extremely radiused corners everywhere. Pulling up my instance, Nextcloud apes that to a tee. You'd be hard-pressed to find any "modern" UI trend that they haven't shoe-horned into their design somehow.

The _did_ completely redo their UI a few years back, and for the worse in my opinion. The Calendar in particular is far less usable and (and much more buggy) than it was around the time it was forked from OwnCloud.