The worst rider experience I can think of is the whole shore being shut down because it rained. The shore evolved this way because of the eco system its built in. As well built as Bobsled is, it is still pummelled after barely a year. You can blame people for riding it all weather as much as you want but at the end of the day, dirt is a high maintenance way of building on the coast.
PS I also freakin' love the Roller Coaster on Pipeline, that thing is amazing.
Bobsled was a new style of trail that gave a bit of novelty and a lap can be banged out in under 15min, because of this, it got [HTML_REMOVED]100 riders a day, add in the fact that it was built in a wet period and never let to set properly, and it's going to get bombed. At least there's the DNV trail crew to patch it up as it wears. Dirt may be high maintenance, but it's easy maintenance.
When done right, dirt will be more sustainable, and easier to fix and patch up, and it won't get polished like rock, and people want to ride over dirt, whereas rock will be avoided.
The berm that we worked on at the top of Pangor is looking awesome now people have been on it, it's rock hard and even smoother than before, and that was all dirt.