Looking for something more integrated with things like Mastodon or Lemmy or Pixelfed, it's too hard of a sell for people to download another messager otherwise.
Also, Matrix is really complicated... I still don't quite have it working right.
Matrix is not complicated, it's Element's UX. It's going in good direction, remember than on WhatsApp people are factory resetting their phones to move chats between Android and iPhone.
You can do clickable Matrix link in bio and there are instances that offer Fediverse+Matrix combo accounts.