Salt-water regret

Personally, I won’t own anything except a saltwater pool. So easy to maintain so much better on the skin. I’ve never had any problem with it as far as rusting anything. JMO
 
I went salt on my pool a season ago, this season I am running back to the TFP method, although I loathe dealing with liquid chlorine, "when I can get it" the salt cells don't do well in my hard water, even with regular cleaning, whereas I just dump the proper amount of liquid in every day and run my little pool cleaner "Dolphin, 2nd year" to keep the bottom clean, I was constantly having to coax the salt unit along "brain" as it would often detect high salt when it was at the proper level. I did notice some rust starting on the top coping this year, but I had the level down to 18inches to lower the salt and found no other rust in my investigation. My pool is now 5 years old and hoping to get one more year out of the liner.
 
I had a top rail rust from salt, I believe. Notice I said A top rail not MY TOP RAILS. I ran a salt pool for 6 years, then I switched to salt. 2 years after switching, one of my top rails developed rust. It was where a volleyball set up rubbed against it and damaged the coating. This is the only spot that developed rust. In all likelihood it would have developed rust without salt as well, maybe a tad bit slower. The point being, it is the quality of the pool and the integrity of the finish that prevents rust. Not the presence of a small percentage of salt or not. I spend enough time around my yard painting, sealing, staining, etc to realize EVERYTHING will degrade over time from sun and rain, no salt necessary.

My biggest issue with salt was that I used to have an overflow on my pool in the skimmer. It ran under my pool deck and drained onto the grass. It kept the pool from getting too full when it rained. When I switched to salt, it eventually killed the grass in that spot.