This is about what we are seeing on regional and national level engines. I know of many engines that have gone much longer though. If peak performance isn’t your main concern, you can definitely get away with much longer intervals before rebuild. I know a few guys who got the engines in back in 2017 and pounded almost 50 hours on them to durability test them and there were no failures. Sure, small loss of performance after that much running, but no catastrophic failures.