I disliked that Tesseract was a bit of a busy mess, visually. I genuinely wanted to like it because it definitely added several useful features. I even self-hosted it for a while. But the default Lemmy UI is so much more simple/streamlined and handles 95% of what I want to do anyway. I would only use Tesseract on occasion, when I needed to perform some action that I knew Tesseract handled better than the default Lemmy UI. But default PieFed supports every feature I liked out of Tesseract anyway, so I didn't miss it at all when I switched from a Lemmy instance to a PieFed instance.