The cell I replaced it with is turning 3 years this month. So far, I see no similar damage developing.
I like to think that I'm taking better care of my AP1400 now that I've learned from the TFP forum. I don't even try to run the SWCG for ~3-4 months during the winter. I used to leave it at the Summer setpoint year-round, not realizing that it doesn't produce chlorine when the water is too cold!! Now, by late November when the water temp goes below 55, I change the setpoint to 0 and sometimes even unplug the cord from the cell (my equipment is in a covered shed). I just want it to hibernate. If I had a dummy cell or an old cell, I would put that inline and store my good cell in the garage for winter to baby it even more.
With TFP chemistry (-0.5>CSI>0.0), I've had almost no buildup inside either.
Chlorine production was still strong/predictable/consistent last Fall before shutting down. TBD for Spring after I drain next week to lower CH. Will need to get salt levels back up.
I have read various user comments on these forums that indicate Jandy cells may have a shorter life than some other brands. I want to say it was maybe 3-5 yrs per cell??
I am locked into Jandy equipment and would never go without the SWCG. So I just consider cell replacement a regular expense. I inspect the cord/cell connection a lot more often as part of my pool maintenance routine. I am shooting for the 5 year side of the range for my current cell! And hopefully no more melted cables.
Lastly, I have read a few things here on TFP about the Fusion Soft that are red flags (added minerals?). You should research that and ask questions to the TFPers in the know if you haven't done that already.