> There seemed to be a lot of velocity in the beginning but the last couple of years have addressed approximately nothing in terms of the UX and it's a crying shame as Matrix/Element had a lot of potential.

It still has.

And with Element X they have greatly improved the UX.

Plus utd errors have been reduced by a lot.

That said, I haven't ever had issues with devices not being correctly verified ( I use that feature since it was released - and can still recover the encrypted messages of that time).