200+ A circuits in a residential home really makes a point for 400 V three phase (where the same load would be ok with a standard 63 A circuit, which is still a lot). [1]

However, when more and more people try to have fast chargers in their homes for EVs, then not only the residential installation poses a problem, but utilities would need to rebuild ~two layers of distribution to accomodate for a 100-200 % increase in residential power consumption.

[1] Not just because high currents are more difficult to handle properly, but also because you need a lot less copper.