To be fair they're not claiming this would ship in mass quantities to end user stores. I concur with Brian in that it's probably SMR and by "support for archive workloads" they actually mean "don't try to use this for anything else than archive workloads". By "consistent enterprise-class performance" they probably mean "it's always slow". If it was any better than this they surely would have said so.
That's not to say the drive wouldn't have its place.. but I think it may actually be good to limit their availability for now.
BTW: it's no excuse, but Seagate has been soft-launchnig drives for years. Sometime retail availability took a full year! I see no reason to get any more tired of this than in the past years.