We still have flair, it's just that the mods have to assign it and they haven't given any out in years. I'm kind of surprised you don't have one, frankly. One that reads "thanks for proving me right" suits you, I think.
Element/Matrix is better since it's both encrypted and decentralized. Also doesn't require your phone number. You can just use a throwaway e-mail and you are good to go.
Other than freeze peach*, it has no interesting features, just like how plebbit has no interesting features.
Otherwise, come over to Arete.