I did a poll and nearly 30% of the people who voted said they used Sync! It's stayed around that percent the whole time too!
EDIT: Here is the poll I forgot to put this here like five times lol https://strawpoll.com/wby5A21R1yA
Same, dev said end of August, but that didn't happen. The guy isn't very fast, but he is a solo dev and the end result is pretty good so it doesn't bother me that much. I'm enjoying Sync in the meantime.