From my viewpoint, multi-hour punts have a couple of plus points.
For this older punter who, regretfully, hasn't the stamina for a session of too hectic activity but can afford a multi-hour punt from time to time, they allow me to take my time and savour the service.
Secondly, they represent a better, more effective, use of money than the Overnight bookings I used to enjoy over the years. When I floated the idea of an Overnight to a MILF I'd already seen a number of times, she pointed out that quite a bit of my money - more than I'd pay for a multi-hour daytime booking - would be wasted on the time that we were both asleep. I immediately saw the wisdom of what she was saying and haven't had an Overnight since!