FWIW, my house had a lot of wiring work undertaken around 15 years ago. It wasn't a total rewire so there are a lot of very legacy faceplates still in use. Around 50% are probably 1990s or older, with the new faceplates being MK Logic Plus for the sockets and MK, Marbo, or Crabtree for other fittings.
Most of the MK Sentry consumer unit was installed around 20 years ago and most of that unit and its modules were retained in the work that took place 15 years ago.
Failures:
buzzing switch on a nearly-new MK Logic Plus 2-way lightswitch after a few months
the plastic broke on the fulcrum of a very old Ashley 2-way lightswitch
a month ago, an MK SP RCBO 30mA type AC that was serving the 1st-floor light circuit since it was installed new 15 years ago tripped and wouldn't stay untripped even with the load disconnected (there was no obvious fault on the circuit and none that I am aware of).
So of the 3 items to require replacement, 2 were modern MK, one was ancient Ashley, and they all related to the lighting circuits. My home installation is more MK than any other brand, but it has struck me as odd that I had two failures with modern MK and none with the older stuff.