Well... I just replaced my first cell with a replacement. It worked for 8 years. I'd say your PB is pushing a bit too hard to be trusted on any equipment issues.
UV is free and plentiful from the SUN. Usually only handy for indoor pools.
Ozone will actually break down your chlorine slightly.... so it uses more than non-ozone pools.
The ease of having a pool make its own chlorine means I don't have to do squat, day after day. In fact, its ideal for vacations! I've left for 17 days before and come home to crystal clean water.
You can trust us....we ain't selling you nuffin!
Maddie