True … 
Because I just read that Stanley Johnson is now a French National I wondered how come…Obvious reason is French Relations…so then this a part of the article in Italian, translated by google to English so expect some errors…
Quoted’‘Stanley is now 81 years old. His mother Yvonne Irène was born in 1907 in Versailles and her grandmother Marie-Louise de Pfeffel in Paris in 1882, a passionate table tennis player. His sister was a tennis champion, who participated in the Wimbledon tournament in 1904, representing France. As for Stanley, he was one of the first British officials of the Commission, from 1973 (when London joined the European Community) and until 1979, responsible for preventive measures against pollution. From 1979 to 1984 he was one of the first British deputies in the European Parliament, on behalf of the Conservatives. In 1982 one of his novels, “The Marburg Virus”, was published, now considered a harbinger of a Covid-style pandemic. Stanley voted against Brexit in 2016, although he later praised the way the UK, under Boris’s leadership, handled vaccine policy, better in his opinion than the European Union. And he underlined that “Europe has gone too far on the road to federalism”. In 1963 he married Charlotte Fawcett. They had six children before divorcing in 1979. Boris, following his family, lived as a boy in Brussels, where he attended the European School, which is still the same today as the children of European officials. He then returned to the city between 1989 and 1994, as a journalist for the Daily Telegraph.’'quote ended
Husband has loads of French Relatives…we have our Titre de Sejour valid until January 2031 so can feel more relaxed with that knowledge just wondered if we can go one step further like Stanly Johnson has…We are European’s always have been can’t get why others especially from the UK who are so stuck in a rut…British what does that really mean anyway…was not that long ago when parts of the world belonged to others…
My understanding of the withdrawal agreement residency cards for UK citizens living in France is that the residency permits were either 5 years valid (for recent arrivals) or permanent (for long term residents). Therefore your titre de sejours is most likely permanent, with only the need to update your photo and card after 10 years.
Whilst that may seem like good news you may well wish to gain French citizenship in order to feel more secure as Europe lurches to the right and also to give you a vote (to accompany you paying your tax in France).