I have a 950xl running Release Preview ring, it's not horribly slow. It could be faster, but you put it head to head with another OS and you're nit picking. They work on PC first because it's the likely candidate for UWP. It's pointless for them to work on a mobile specific app. Even if it is a port. The more features PC gets, the faster PC gets, the quicker we get a UWP. There is zero need to support anything below 2gb ram, period. The app doesn't use the 2gb, the OS does. The app uses a sliver of it. If the OS can't support the process of opening the app, what does it matter?