Indeed. I've used RiF forever with Reddit, it has such a nice clean interface and is so well polished. It's such a shame to throw something like that away.
I used Baconreader when I first joined Reddit, then switched to an iPhone and got Alienblue just weeks before it went away, switched to Apollo and loved it, but it's iOS only, so when I switched back to Android I had to leave it. Wasn't super impressed with Baconreader by then, so I tried out several others (RiF, Sync, etc.) and Sync was my favorite. Been using it for years.
I'd be absolutely delighted to have it for Lemmy.
Jury is still out for me whether I'll stay here, but having Sync for Lemmy would go a long way!