[On Paul’s comments, there was a recent usenet thread re “standard” 15½-ampere 3ø 230/400V service for (assumedly single-family) residences in an area of Portugal.]
I've seen 3-phase residential with a 15 or 20A main in France too.
Most new British residential services these days are 100A (240V 2-wire single-phase). There are still plenty of 60A services about, and even a few 40A, though quite rare now.
There is a home about a mile from me that has a 600-ampere switchboard
What on earth are they running in there? One of those linear accelerators?