A Wifi light bulb doesn’t make sense because the bulb has no idea what room it is in and configuration and grouping of bulbs into logical rooms or room “areas” to be controlled at once would be too much for the average home user. You would need to do this every time the bulb is changed. Also consider that the wifi…

Why turn the switch off and then back on? Since the switch has to be smart anyway, just design it as a momentary contact. Push on, push off. No need to turn “off” a switch that is already off!

No reason to do that if you use a electronic dimmer rather than a manual one. Ever see the dimmers where you just hold your finger on a panel rather than moving a physical knob or slider? Now you can dim the bulbs with your phone, motion sensor, the wall control, or whatever.