Snaps used to be terrible, I used nextcloud back in the early days of snaps, the performance was truly atrocious.
They've spent a lot of time improving snaps so the performance is apparently not as bad, but initial impressions tend to last, and if it's an application that's too much of a pain to build a freebsd jail out of I just use docker instead.
I gave them a shot, they disappointed me, and the bs they're playing with moving all the default Deb apps to snaps is pissing me off more, but, I'm not a cop, and if it's convenient and works for you, go for it.
I will say setting up nextcloud was basically trivial and functionally worked like a charm, even if again the performance was just garbage back then.