But the B2031A is a good speaker, no?
Well yes, with some suspected slightly bloated bass, some tweeter (grille) issues and a bit of hiss (a small input gain adjustment range does not help). Still excellent value for a fraction of the cost, of course (something like a factor of 3 in Europe, no kidding), and the bass driver seems to be quite robust, but not entirely on the same level of refinement.
In any case, if stamped steel is good enough for Neumann, this matter clearly can't be
that important after all (assuming a certain minimum strength of material). Perhaps it should rather be seen as a sign of a manufacturer who knows how to make the right tradeoffs between cost and performance, as you would hope in something mass-market and mid-price like Yamaha HS8s.