On my Cala 8 (Linx 2 9)'s, my fitter set a click on the left button to be Volume Down and a click on the right button to be Volume Up. Holding the left button does Program Down and holding the right button does Program Up. It’s pretty easy.
These aren’t exactly the same as Linx 3D, but I’ll bet it’s possible to have your buttons programmed the way you want them.
I think that’s probably just about true in my case.
So, what about the other one-fifth of listening environments? What if I spend a significant amount of my time in those environments? What if I tend to move among the one-fifth minority environments several times on a typical day?
80% of listening environments certainly doesn’t equal 80% of a wearer’s time, even if that auto program is set up completely correctly.
The whole point of alternate programs is for those settings in which the auto program isn’t appropriate. Even if they’re not used often, they can be pretty handy when they are needed.