The lack of easy testing made me not use it. There were a couple testing plugins users had made which could kind of do unit and integration testing but they were super finicky.
I should add that I was specifically trying to use c# ecosystem for godot at the time and their plugins for testing. Since I ended up with Unreal I'm refreshed enough in c++ that I might check Godot 4.0 out this weekend again.
If you prefer, there's also a collection of Godot games on Itch.io: https://itch.io/games/top-rated/made-with-godot
Personally, I highly recommend checking out Cruelty Squad: https://store.steampowered.com/app/1388770/Cruelty_Squad - It's a fun game with a unique art style.
[1] Desktop: https://www.youtube.com/watch?v=UAS_pUTFA7o
[2] Mobile: https://www.youtube.com/watch?v=xF3QiQfQxeQ