I’m sorry to say, but you seem to be clueless in the world of software engineering. Open vs closed source does not make any software better or worse. This solely depends on the talent and will of the developers to create a good app for you. That can happen in both worlds, but just because an app is not open source doesn’t make it better in any ways. Rethink it. Sync might be a nice client, but you’re dependent on this one dev to always deliver a good experience and keep updating, whereas if it was open source,you could be sure someone would continue the work and help fix some issues if anything was to happen. Open source has a lot of potential. Don’t let anyone fool you into thinking it’s worse in any way. It’s not.