I use it quite a bit to open the multitasking cards. Occasionally I use it for shortcuts to apps, but there are far too few that have added that functionality for me to be able to remember to use it regularly. I have to consciously think about using it that way, where using 3D Touch to open the app switcher is pretty much ingrained for me at this point. I don't use the peek and pop too much yet, to be honest.