I'm speculating, but there seems to be a trend among service providers to provide a native experience for the big 2 (android, iOS) and let the rest use their service over the web. So perhaps they will continue to support i.reddit.com for users outside of the big 2 ecosystem

I'm also probably in the minority, but I just use the desktop site in mobile Safari, despite being a heavy Reddit user. It's an information-dense design, and I can read the small text without a lot of zooming, so it's probably more efficient for me, or at least I never saw a reason to switch. I should test out Alien Blue, though.