Just couple of thoughts / short comments... personally I had to adjust more on Sailfish 1.0 than on 2.0. I liked the live tiles with swipe more than push button-version though.

I don't know how you use your iPhone, but I never had that kind of experience with 6s.

Initially, perhaps. Not any more as main driver is actually delivering something that is not made and controlled in US. Alternative UI, idea about OS respecting your privacy and being generally friendly didn't pay the bills, so they had to shift the focus to something else - like tailored for Governments stuff.

Or die to oblivion because nobody can buy devices running your community-OS. If you have deep pockets, you can try to pull it off. If you don't, you'll have to adjust.

Problem here is that most 3rd parties want to control their service ecosystem and user experience, hence they write their own apps instead of relying on integrating them into existing messaging UI/framework. Maemo-style integration was pelasant in many ways, however, in that way you are always limited what the original messaging offers. It's hard to see how it benefits those 3rd parties and their products/services (after all, they want to get more money out of them in one way or another), so you cannot force it though the OS - try it and you are on your own with community members so butthurt about privacy demanding native Facebook/Whatsapp/snapchat/whateversocialmediaspyingplatform client/integration to your OS you are unable to deliver...

Much of that ended with chapter 11-type thing....