Depends what you mean by mesh. For me, the defining characteristic is better support for roaming/fast handoff, things like 802.11k and 802.11r.
Agreed it's best to connect the access points with Ethernet.
Agreed it's best to connect the access points with Ethernet.
802.11r accelerates the multi step handshake that you have to perform with WPA enterprise when you roam from one access point to another. There is a much shorter handshake for WPA personal so there is no advantage to enabling 802.11r if you’re not using Enterprise auth.
For WPA3-SAE and WPA3-OWE it is required as each client has a different (session) key.