Matrix has gotten to a complexity threshold that makes it near-impossible to have independent client/server implementations. Element is terrible, and many contenders are better in a way or another, but all lack some essential feature to turn them into practical alternatives.

I've been using fluffychat for over a year. It's a nice interface and the client I used to convince less technical friends and family to give Matrix a try. Unfortunately major functionality like being able to send images becomes broken for long periods of time https://github.com/krille-chan/fluffychat/issues/2497

And for desktop apps, Cinny has custom emoji/sticker support. Would be nice if they played better with Element though.