Having just dealt with this issue, I have recent first hand experience. Our neighbourhood, which was built in 2005 - 2018, when the Provincial Govt was pushing everyone to replace electric heat and water with gas furnaces and gas water tanks, has only 100 or 125 Amp service in each home. By code, we are restricted to using only 80% of the main breakers, which for us is a meagre 80 amps.
Although we didn't install a fast charger, we have added air conditioning and a hot tub, so would be pushing the limit on the main breakers. I contacted a local electrical contractor to double our service to 200 amps. He mentioned our timing was perfect, as a number of his potential customers, requesting service upgrades, are denied by the power company, as the local neighbourhood grids didn't have the capacity. With the number of chargers and air cons being installed locally, he figures our local neighbourhood grid will be at capacity in a few years.
The power company has the generating and transmission capacity, but has numerous restrictions at the neighbourhood level. Our local distribution network was built for 100 - 125 amp service to each home, so will not have the capacity for everyone to increase their service. Based on costs, the difference of increasing to 150 or 200 amps was negligible, so I expect most home owners will opt to increase to 200 amps,
Since our Govt is pushing everyone to electric heating and EV's, I can see an increasing need for homeowners to increase their service, which at some point has the potential to reach the capacity of the local distribution networks.