I am not sure that the fact that we have spring loaded PCs for reserves is a good argument for defending them for mains. Reserves are special in a few ways:
- AADs need to be able to activate the opening sequence, so you need the spring loaded PC for that, no way around it.
- They are most of the time activated after a cutaway, more often than not caused by a spinning main and activated via RSL or MARD, so the large burble created by a wingsuit or a balloon suit are simply not there.
- The PC does not stay connected to the canopy.
Different use cases and boundary conditions, so different solutions. I am quite sure that if wingsuiters start relying on spring loaded PCs we'd start seeing soon a lot of videos of PCs being sucked in their burble.