It is really hard to say without seeing them, and maybe in them, at least for me. Condition is everything.
The best thing to do is to periodically (every few years) take them off, clean them as needed, inspect them, and maybe have a shop pressure test them. For the big coolers, that is rarely done, at least by most, but more commonly and frequently done for the smaller ones. And, in between, keep an eye on things and maintain as needed.
But, this is one of those things where personal philosophy and type of use matters a lot. The balance between PM, boating, and the rest of life tends to be a very individualized one.