I like the many features of Piefed, but the lack of mobile apps and good clients (such as tesseract) is a deal breaker for me. And the Lemmy backend is written in rust, so it's very fast, as opposed to python, though I understand why one would use python instead of rust.
I hope Lemmy catches up with the features. I'm not fully comfortable with donating to the devs because they run tankie authoritarian-bootlicking instances, and are transphobic.