Tower height can be customized for the terrain. Superstar at Killington gets rather close to the ground at several locations. They do that so they can use adjacent trees as a wind screen.Does that have to be that way though? Or is that just typical because of the terrain they're typically on? Or maybe that they tend to be newer and the more modern tendency is taller with less towers (or something like that... just speculating here)?
A further danger for a detachable is when they are detached. At the turnaround a fixed grip is clamped firmly to the line. A detachable is actually resting on a tracing track. Toss in some wind and things can go sideways much easier than you think. They just hang by weight in the terminals, lose the skier weight for stability, swing around the end for some added movement, and then add a gust of bad wind—it could be a problem.
Gondolas are stabilized in the terminal to make them easier to load. Therefore also very little room to swing.