This is buried toward the bottom of the release notes so I'm bringing it up here:

Added instance-level default sort type

Any admins out there considering changing their instance sort settings or asking people on their instance if they'd like this changed, given that we can individually set sorting anyway? Taking into account the inclination of people to never adjust default settings (I remain deeply curious about this tendency, as an aside), I think it might be worth at least bringing up to one's instance community.

If they decide they want it to remain the same, all good, and even better, it raises some people's awareness that they can change it themselves.