Like many companies Nuki seems to be going down the cloud route more and more leaving home automation enthusiast which prefer local communication behind.
The WiFi on the SL3 can be used to communicate with the cloud API without having to use the bridge. It beats me why they haven’t been able to add some form of local API to the SL3. The only real reason I can come up with is no priority.
I got the offer to upgrade my SL2 to SL3 but I really see no benefit as long as I can’t get rid of the bridge.