From this article it sounds like Docker are keeping Desktop and Docker hub, neither of which make a lot of money (I'd have thought?), so not sure what their plans are to develop those, but you'd think that without the enterprise product line, they'd perhaps need to start monetising Docker Hub more...
It's weird. Assuming Docker Enterprise was keeping the lights on, why would you sell your cash cow? Maybe the price was too good to turn down. But now Docker Inc finds itself in the same shoes as other companies trying to monetize open source without a platform.
If this means we'll get to pay for Docker on the desktop AND it'll get improvements, I'm all for it. But it's a tough situation nowadays (nobody expects to pay for most developer tools).
Other registries like Bintray or GitHub Registry charge $0.45—$0.50 per GB egress, while Docker Hub charges a much smaller flat fee.
From my experience most companies using private repos use their cloud provider's ones for the IAM integration.