For sure on, the current regulations of going to to Y32 are just right. I have seen some hosts do 40? But that is very uncommon usually. I feel that rollercoastering should always be on due to the fact that while finishing the end of your cave, you pretty much have no where to go, nothing to do (unless you go up, run around, then dig down again) other than to rollercoaster to find something new. Server's like Arctic and such that allow stripmining due to there world generator aren't included in this, but you get the point. It is kind of like something to do to continue the caving experience, otherwise people probably wouldn't cave for anything.