I used to use crappy external SSDs for all my data, so I wanted to build a NAS (because you get more bang for your buck with specs) than buying a prebuilt, like QNAP etc.
The thing that swung me to UnRaid was the ability to have Dockers. TBH, I didn't know I needed any until I looked through the community apps. Now I have a Minecraft Server, FileZilla, Plex, AdGaurd Home and an Automated Speed Tester, to name a few.
I'd run independently on my desktop for most of the above, so having them on 24/7 on my build in a docker is just amazing.
I can't imagine my home setup without it now. You won't regret it!