Didn’t try anything else like TrueNas so take it for what you want.

OMV5/6 are pretty good NAS softwares with an out of the box working interface. Nothing really you don’t want.
Upside: It’s Debian under the hood. So if you want to dip into Linux I think it’s great.

My only gripe is, it’s impossible to upgrade between versions. You’d need to wipe the OS and restart (afaik).