traction? the xmpp moment was 20 years ago. it's over now
If reviving XMPP is the battle you want to fight, best of luck but I'd encourage you to take a step back, face reality, and spend your energy on something with a better chance of success. And I say that as someone who used Jabber all day long 20 years ago.
For anyone paying attention, it should be the clear "safe bet" for what to try next/keep at hand somewhere.
but what ?
All we need is for a billion dollar company to build their own implementation and XMPP can be back once more. Exactly the way it gained popularity back in the day.