Thing is people that use Apollo and other 3rd party Reddit apps really love their interface. Personally I do everything on a laptop/desktop so I'm not familiar with those apps. I don't do much on the phone other than text/voice. Though I have tried to access Reddit through Chrome mobile and it's pretty much unusable. Their in-house app is not much better from what I understand.
Since Reddit's API pricing is going to wholly drive away 3rd party apps, I think it's going to come down to Lemmy's apps versus the Reddit in-house app. From what I understand the bar is pretty low so Lemmy just needs something that works decent.