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
It's good we have plenty of options. I'm going to try Boost as well because it's the app that really hooked me to reddit and in the end it brought me to lemmy. Although Sync has been so great there's no guarantee I switch. And if Boost released earlier, I probably wouldn't even tried Sync. Let's see them compete. Or collaborate. Or both.