Well, here in a 2 bedroom flat around 60 years old I have a slightly upgraded board ( as in, upgraded from wire in fuses sometime in the 1970's when the DCC wire was replaced with PVC wire, and this board was upgraded when my father bought to replace the ancient HYMAG breakers it came with) with a incoming mains douvble pole isolator, a double pole feed for the water heater in the basement, the earth leakage breaker, then 6 circuits providing all power, 2 for lighting, 3 for plug outlets, and the last one for the electric stove and oven. Spare breaker that used to supply a instant heat boiler for the kitchen, now I just use the geyser downstairs.
Only original wiring is the supply wire, old 16mm DCC rubber insulated, which is direct to the meter. If I ever replace that I will have to put in a new cable, 16mm split concentric cable, wired via a separate route, as the old wire is not too likely to pull out of the old steel conduit easily. As it is only around 20m to the meter room that at least will be easy to do, there are existing cable trays and mounts to hold it. Just have to paint the exposed sections to match the building.
There is enough capacity to handle all the loads, though there are a few socket outlets per breaker, so you do not really need a single breaker per outlet, though you might in the USA, and it is generally good in industrial use, where you might have a lot of high current loads all at once.
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