@PhilipDAth I've noticed the same interop wise. Ironically almost every client that worked with WPA2-WPA3 personal transition mode also just works with WPA3. The handful of WPA2-only clients I had struggled to deal with a transitionary network.
I'm getting pretty tempted to segregate SSIDs to give me a WPA3 dedicated SSID. Even with PSKs, WPA3's fast transitions help a lot with video streaming when jumping between APs. WPA2 + 802.11r was great at that too but now with KRACK I'm still afraid to use that combo with PSK.