The US offers much more affordable housing, and in many respects a lower cost of living than in the UK.
It appeals to those who don’t want to live with a language barrier, but want more space, possibly more sun, and an American Dream of their own.
There are some important things to factor in before you move, such as the additional cost of healthcare, and the exchange rate. However, one bonus is that your state pension will rise at the same rate it does in the UK.