In fairness I think it found a niche in cargo, albeit one that is diminishing. Just about big enough to take ULDs, if that's your thing (Either Lower Deck Airliners, or bespoke) and just about small enough to bulk load (although it would take maybe 90 minutes to completely fill it). Freight doesn't care if it's noisy, or slow, or bounces around in the clouds. All that matters is that it gets there on time...
Which it would, but then the cargo door would feeeze shut, and that was that.