I recall one of the issues leading up to their abrupt cancellation was fulfillment, so I can't help but suspect there's some potential (long-term) issue they couldn't work out for this dev kit's chipset. Maybe some part of the chain was held together with glue and "this shouldn't fail but continue anyway" and whatever hardware issue eventually hit something critical. (And they intended to fix this some time after shipping, and gave up halfway through fulfillment)