The thing is, that bow unloads in a narrow time window, and if you're not on timing, your cast collapses, making the para taper less forgiving. This is why I always say para rewards good timing, and short, smooth arm movements + haul.
As I've also tried to describe, functioning rod tapers mix elements of both para and progressive, especially in the tip.
I will maintain the best definition of progressive v. para is the moving band of working energy in progressive taper, v. the increasing working rod length in the para.
And all working rods blend the elements of both tapers. Right in the middle, you get that swooping wet-fly taper. The most powerful rod I've ever fished (not counting RPLX/TCR) is 8' Heddon 1-3/4f, and it's a wet fly taper even with its slightly flared butt. The RPLX, I cast consistently 140' one day fishing the surf.