Let's be honest though: Google et al have set the standard and now it's every hardware developer's dream to create a platform that they can then use to extract

Let's be honest though: Google et al have set the standard and now it's every hardware developer's dream to create a platform that they can then use to extract 30% of all app sales on. As a heavy crowdfunder of hardware projects, it is a rare gem that isn't one of those awful closed platforms hoping to become a walled garden.