Define "better" I think - processes such as the proliferation of spoilage microorganisms will happen more slowly at low temperatures, but too cold and you will start precipitating out proteins etc that would normally be present and contributing to the flavour. And serving much below cask range just kills the flavour.
On another topic, I've just come across this puff piece about Lees reaching the 5000th generation of their yeast (with a cameo appearance by Paul Jones of Cloudwater) in 2019 which I missed at the time. They've only been repitching it since 1967 so a baby compared to the yeasts used by some British family brewers. Only really works with multistrains though, you need that diversity to give it resilience against mutation.