I can say I get your point however 30 users isn’t “scalability”, it is just a normal family. I usually try to test random versions of Nextcloud from time to time to see it they’ve improved however I can’t even make it work properly for myself let alone 30 people.
I’m not sure what you consider “great experience” but a lagging webUI that spits dozens of warning and errors into the console doesn’t cut it for me. Let alone a piece of shit webmail that isn’t even capable of making a bullet list display properly or compose messages in a textarea larger than 200x200.