Most of the threads I’ve found on other sites (both Reddit and the Synology forums) have basically said “go with Docker”. But what do you actually gain from this?
People suggest it’s more up-to-date, and maybe for some packages that’s true? But for Nextcloud specifically it looks pretty good. 32.0.3 came out 1 day ago and isn’t yet supported, but the version immediately preceding that, from 3 weeks ago, is.
I’ve never done Nextcloud before, but I would assume installing it via the Package Center would be way easier to install and to keep up-to-date than Docker. So what’s the reason everyone recommends Docker? Is it easier to extend?
To my thinking the most important difference would be mobility. Using the Synology app would probably make setup somewhat easier, but if you ever decided to leave the Synology ecosystem migration would likely be more complicated. That by itself isn’t a recommendation one way or another, but it should definitely factor into your planning.