I think, if Niche were to give burrs options, I would rather like them to go a full circle, offer Niche Flat BYOB - no burr or Uno or Duo. They can provide the users to buy carrier(s) as options to mount the burrs.
People would still prefer trying other burrs like SSP, which may require some customisation of the carrier.
It is up to owners to choose compatible burrs set. If the carriers don’t fit properly, folks will still express opinions. It also opens other challenges like for example tolerance, grind consistency, particle distribution, optimal running of the motor and so on.
I remember some discussions here if only Niche were to offer a zero with swappable burrs between conical and flat.
The point is people will have similar reservations / views re-the swappable conical and flat burrs.
Of course, the Duo swap is different, which I think is a very smart move. It would surprise if this does not become a norm, going forward.
Don’t think the businesses can satisfy every one! 🤷