I find the 3D Touch very useful. More and more developers are updating their apps to take advantage of 3D Touch. I do agree the hardest thing is remembering that you have that option. But once you get used to it. It's hard not to use the feature in each app.
As far as Siri goes. I would say it is very similar. It takes actually trying Siri out and just asking it stuff. The more you ask it. The more you start realizing what it can and can't do. And at that point, you get used to using it on a daily basis also.
As far as Siri goes. I would say it is very similar. It takes actually trying Siri out and just asking it stuff. The more you ask it. The more you start realizing what it can and can't do. And at that point, you get used to using it on a daily basis also.