are the better DACs starting to converge on the same good sound
Good question. I am curious to hear what people say.
We certainly would not say, "Are the better cuisines starting to converge on the same good taste?" Excellent foods taste different without converging.
The question raised, for me, is whether that is true of sonics. My guess is "yes" but the degree to which the DAC is a large contributor to those divergent cases of excellence is an open question.