I think the tubes are noisy and wear out cables. They don't even pull the peep straight (which is really noticable on my bow) because the cable is off to the side. Tubes dry rot and have to be checked and replaced. Ideally the peep should line up without the help of the tube anyway, so why not just get rid of it?

tubeless are probably faster, they can have bigger holes, but can be hard to set up.