Moegle

No idea whether it’s their reason, but anecdotally I’ve found it has a few benefits. If coordinated properly it’s significantly easier to train new(er) staff, it improves cross-organisational understanding to overhear other departments’ conversations either at desks or in break rooms, and it stops people becoming isolated pockets of knowledge and culture because they only ever see or interact with the same one or two people.

Given the context of the article, the alternative suggestion isn’t “set up your own server” but “use software that doesn’t require a server”, which sidesteps most of that list.