My understanding is that the failure mechanism isn’t the bulb/gas part. It is the electronic driver that contains the ballast (or equivalent of the NRD function of a ballast).
These electronic parts generate some heat and they are packed tightly in the base of most CFLs and you can see discoloration of the surrounding material (usually some kind of plastic) which eventually leads them to fail.
The older CFLs with separate base and bulb were better about handling heat. Even so, I am getting 30,000 hrs life from the few CFLs I still have. Hrs would likely be higher if I never turned them off.