You should do it. Easy to setup using either their official AIO image or the community-driven micro service one. I am using the latter and it's been amazing. It's completely replaced Google Drive, Calendar, and Contacts for me and with the DAVx5 Android App it feels like a drop-in replacement. I am also using the auto upload feature to back up my photos to it.

I would too, but after like a week I get bored of maintaining it myself when all the expenses summed together aren't much cheaper than Proton or likewise. This is what I was doing before submitting my independence to Proton.

Furthermore Nextcloud is just too damn sluggish. The web interface makes it seem like my server's idea of a CPU is a kid with a calculator and WebDAV isn't designed for cloud storage. I'll take new features being slow over my whole experience being even slower any day of the week.