It would be a good idea I think, to go for an extended holiday before you make a decision.
You need to be aware though that if you live out of the UK for longer than 6 months, you will lose entitlement to several NHS schemes such as free sight tests, dental treatment and prescriptions. Your state pension does not go up in line with the cost of living either such as it does (very rarely) if you were living in the UK.
Times article claim that Waspi women are tone deaf and should read the room


. Whilst we were over there, we travelled widely including to LA. I liked the States but I’m not sure I would want to live there. My biggest issue (as other’s have said) would be healthcare particularly as you are both in your 70s – you say you are both fit and healthy but as you get older you are going to need health care – that is a given - and when I say that I also mean social care – support at home etc everything in the US is paid for personally or more likely by insurance and health insurance won’t cover everything and you will find, because of your ages, your premiums will be real high. Also, in the US you need a car, no question. I think as other have said it would be something to try first for an extended period of time to see what it is like rather than burn your bridges.