I find this topic interesting in the fact that most UK mains sockets still seem to be unswitched.
Everything is always plugged in here and only the washing machine, toaster and kettle is turned off at the switch normally. If there is a thunderstorm around, then a lot more stuff gets turned off and actually unplugged.
Here in Oz (and NZ previously), I have to really press the memory as to whether we actually had any unswitched sockets in any residences in the last 55 years. We possibly did, but I can't recall them.
A bit of info on Oz electrical regs re plugs and sockets is here
https://en.wikipedia.org/wiki/AS/NZS_3112 and mention is made that unswitched sockets can be used for stationary appliances or luminaries providing it can not be easily accessed for other purposes.
Terry