My response wasn’t knee jerk. I went and downloaded the app in question and played with it. I disagree that the main reason we haven’t gotten to a better place is vested interests. The “write once, deploy anywhere” fantasy has been going on for thirty years now. It’s not that it doesn’t work at all, of course it does. But it comes with many downsides vs software written with one platform in mind, and that’s unlikely to ever change.