These all seem very expensive to me, considering the last several drives I've bought, were cheaper coming in a USB external enclosure, with a wall wart PSU no less, than if I bought same capacity bare drive... so they were essentially paying me to take an external enclosure.
I know the reason, data blah center blah cloud blah demand blah blah. Regardless, I've now had external drives old enough to have aged-out/failure and enclosures to reuse. Since the enclosure is like protective shell I'd want for a bare HDD anyway if I was swapping them in and out, I feel like external docks are not so useful any longer, except those that are standalone and clone drives, for certain computer/corp business operations that do a lot of cloning.
luv2liv, what is your use case? I find it just as fast to simply unplug a USB3 enclosure based drive, if not just disabling in the OS, or having it on a USB hub with switched ports so can just switch that port off.