I just sort of wanted to learn how to build (rudimentary) versions of the same apps I've always used made by other companies/people, and like the idea of the data being as clean as possible. I'm a bit of a data purist, so I store all of my photos unedited, and keep all of my text documents as simple as possible (minimal formatting, data-heavy).

I'm also wary of just moving from one product to another, with the hassle of transferring things over constantly, security breaches, product sunsetting and all of those sorts of things.

I'll give Nextcloud a look out of curiosity.