To be frank, Sync has a lot of polish. When I used reddit I would try another app every few months just to make sure I wasn't just settling on a familiar experience.
For me Sync has provided design that's consistent, the most accessible and legible settings, and it performs oh so well, even on low end devices.
Sure no one needs Monet support, nor an app that matches the platform its built for, nor do most need an expansive feature set (tablets and foldables support). But, it's great that lj provides these, I've never had anything really break in the app either. In 10 years of use.