Times change
I grew up in the '60s, in houses that were all built pre-war. Almost all of them had been re-wired to the post war ring main standard (even then, electrical work was pretty rigorously regulated), and it was very normal to only have one or two single sockets per room. But then, what did we have to plug in in each room?
One radio, and later a television. Maybe a floor standing lamp, and possibly a record player (maybe combined with the radio). Bedrooms had maybe a lamp or two, and possibly an electric blanket.
I've just done a review of the electrical devices in our living room around me. One television, one Sky satellite system, one non-Sky satellite system, One Bluray player, one DVR, one VHS tape player (yes, these last two may be a bit of an anachronism), one Roku box (OK, this is USB powered, but has a wall wart). Then there's two laptops, a USB wall wart for anything that may need power, a floor standing lamp (my wife does jigsaws, and wants a fill in light to stop shadows) and currently a Christmas tree.
My 'office' (a multi-purpose bedroom) has more than the living room (also having a full AV setup, as well as several computers, monitors and printers), and a second reception room has a full separates HiFi setup and another telly. But we do have several separate 30A socket rings for different floors (and 2 on the ground floor) and also one for the kitchen.
We have a lot more electrical devices now than we used to use, and consequently, a need for a lot more power outlets, and honestly many older houses have too few for modern life. We frequently use four (or more) way power bars, which if you are careful, and use mostly low power devices (come on, how many devices do you use that draw even as much as an amp at 240V outside of the kitchen/utility) pose no risk. Fuses in the plugs provide an additional level of protection from overloading these.
I know how other countries provide many direct feeds from separate circuits, particularly when they have lower mains voltages, but I often wonder just how they are wired, but there's a potential for big bundles of cables. I guess a lot of them have floor spaces and hollow walls to run them through, something that my current 100 year old house just does not have (solid ground floor, and most walls solid.
I would like to see low-voltage (maybe 12V or even 5V) with other devices using DC-DC converters arranged as a plug-in track become more standard. This would be a better fit for modern life, but would take years to become well established.