In my fifteen years as service manager, We replaced very few regulators. I have been a RV owner since 1968 and I have had one failure. Almost all the regulators that failed and I took apart, had a broken plastic lever that caused the problem. Don't you just love plastic? (SAC.) Personally, I would not replace one unless it failed. This is just not a high failure rate piece.
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.