combining Element with SMS and XMPP

Hello all, thanks for developing the great Element app. This is a post to ask 2 questions, I hope you'll indulge me. The questions are:
1. To your knowledge, has it ever been tried to combine an app like Element, for communicating via the Matrix protocol, with an SMS app, in the same way that Signal offers its users the possibility of combining Signal messages with SMS messages?
2. To your knowledge, has it ever been tried to combine an app like Element, for communicating via the Matrix protocol, with the ability to communicate via the XMPP protocol?