Like so much in life (well, my life anyway) something significant has to happen to deflect you from the comfortable path you are happily following.
We bought our house here in 2006. I was lucky to retire early, albeit on a frozen pension and lump sum until I reached the qualifying age. My wife continued to work so I spent all summer here plus 4 further one week or ten day visits. Once my wife retired (also early), we spent more and more time here. Then June 24, 2016 happened . We had gone back to the UK to vote, a three day trip, and returned immediately afterwards, overnight 23/24 June. We awoke, in France, to the shock result. The next week we started putting our ducks in a row to move permanently .......
Having notified everybody we could think of, I spoke to the Mayor who knew how much time I spent in France and we agreed 1 February 2017 would be a good date to make it official and he gave me an attestation to that effect to use with the health, tax etc people. It had been our intention to rent out our UK house unfurnished so I went to the UK in January 2017 to supervise the removal company which took everything save for a bed, sofa and telly. To make the house rental ready, required me to return to the UK a few times and put some hours in. I found this increasingly unattractive so the house remained empty, for the most part, aside from the 5 visits a year my wife made. We then got a letter from Epping Forest District Council stating that it intended to use new legislation and increase our council tax by 100% as the property was empty. At the same time, another office in the Council wrote to offer me interest free loans to prepare the house to let. Anyway, we decided that it was foolish to pay TV licence, insurance, a gardener, window cleaner and double council tax on a house that was hardly used so we put it on the market and sold it - it had taken another significant event to shake me out of my complacency.
So, the abridged version is I moved here in February 2017 and have not been back to the UK since - before CV19, my wife made five trips a year and I expect that to resume eventually, all being well.