I guess that the few machines on the sales floors here must be the last 220 volt washers available. It must be mostly old housing stock like in NYC that does not have 220 volt service; can't imagine living like that. Newer housing here is much less likely to have gas lines to the laundry room, but always 220 volt electrical connections. I think builders get a break on the running of electrical service to new construction if the homes will have a certain amount of non-seasonal 220 volt appliances. The oven(s) and the dryer outlet usually get them the break.
I remember in the 60s the American Gas Assn. tried to market "Gas" communities where the houses would have builtin gas cooking and gas dryer connections as well as gas heating and cooling. Each home came with a gas yard light also. Fortunately, the building codes mandated the standard 150 amp electrical service so after the trials of gas central AC, they were able to put in electric central air.
I remember in the 60s the American Gas Assn. tried to market "Gas" communities where the houses would have builtin gas cooking and gas dryer connections as well as gas heating and cooling. Each home came with a gas yard light also. Fortunately, the building codes mandated the standard 150 amp electrical service so after the trials of gas central AC, they were able to put in electric central air.