I used to use the official Reddit app back in 2019. Then one day, I was watching MKBHD's What's On My Phone video where he showed Relay for Reddit. I started used Relay from then on. Was very impressed with Relay, paid for the pro version as well.
I thought of trying out all the clients to see if there was something better. Saw Sync being recommended on random discussions on r/AndroidApps. Gave it a try. It was good, but I was too used to Relay to make the switch. Read about the beta program for Sync (I think it was v21), gave it a go. It took some getting used to, but it was perfect for me, switched to Sync full time. I decided that I'll buy the pro version one day (I was kinda broke :[ ).
Stuck with Sync since then. Purchased the Pro version on 7th April 2023 (had landed a well-paying job a few months prior :] ). Then a month later all the API shenanigans happened :(. But I don't regret the purchase one bit and I will buy the Pro version again once Sync for Lemmy comes out.