I think for me it's what you as the player are used to. I grew up playing on organs and later on electric pianos and early synths that didn't have it, so I wasn't used to using aftertouch, and even now I don't make a conscious effort to use it on very many patches. I guess the fisrt synth I played that had it was the M1.

The short answer ( for me ) is that I wouldn't miss it a bit, and in fact at times on the PA80, with certain voices, it becomes a bit annoying to me, so I've reduced the sensitivity setting as far as I can. Instead if need be, I prefer to assign my joystick / mod wheel to certain parameters ( other than modulation ) and use it as a controller.

AJ