[Angostura]

If you go into settings and turn Wifi off it is completely off. Turning it off from control centre is a useful alternative where it disconnects, but leaves it available for geolocation and airdrop - it's really rather useful.

[aluhut]

This sounds terrible. Why not having it op-in? I'd expect that I'll need to go to settings and add it to the functionality of the control center button.

[Angostura]

I suspect because Apple found out that people were primarily using the Control Centre switch for 'This WiFi network sucks get me off it' reasons, rather than 'Disable all Wifi circuitry reasons', so optimised functionality for the use that users were using it for.