I was one of the first to start the French process, even got the language attestation well in advance, but then saw what all the hoops needed to jump through, and thought that I will take my chances with post Brexit.
Also, I realised that what I really wanted was not French citizenship, but continued European. I have always been a committed European, not even bothered about being British anymore.
Oh, and I have always emphasised that I am an immigrant here, not an expatriate. 