Matrix is a protocol, not a UI. There are many Matrix clients with vastly different UIs and UX. To distil Matrix down to a 'UI' is missing the entire point of Matrix. It is like email, it will inevitably become ubiquitous. 35m users so far: https://element.io/blog/element-raises-30m-as-matrix-explode...

There's a reason that governments, militaries and healthcare systems are choosing Matrix over Discord!

I've bridged all my other messaging apps to Matrix, now I just need a single messaging app. I even get my SMS via Matrix. Can Discord do that? Nope. If it could, would you trust it? Probably not.