As homes need more power, they are delivered more amps. The common for newer construction in the US is 240V at 200 amp or 400 amp for larger homes. Older homes will have anywhere from 80-150A depending on when they were built or remodeled enough to require replacing the main service panel.
Stove, HVAC, and dryer require their own dedicated 240V circuits.
In eu you don't have to think where to plug 2.5 kw space heater. Any outlet is good enough. In the US you have to. And with home appliances actually becoming bigger and more powerful I think that even the EU baseline will become too constraining eventually. Since usually there are limitation on the gauges that are ran from the main breaker to the sub-breakers (don't know english electric jargon)
Where I live I have a wire that can hold I think 40 amps in the wall from the main breaker to the board where the small breakers terminate the different home circuts. If I want to upgrade it is dig baby dig. 6 floors.
The 120V in the US is a 640kb ram should be enough situation. You were first, thought you build the spare capacity, were surprised by the explosive growth and how useful electricity really is.
With modern homes moving to 100% electricity even 240 is not enough. In my flat I have pizza oven (3kw),inducation burner x 2 (3kw each), normal oven, 12000 btu AC x 2, tumble dryer, some other appliances that chug sub 1k... throw in some car charging, electrical water heater... A modern home is using orders of magnitude more electricity. And it is going up.