Nothing that was possible then is less possible or less potent now.

The narrative is not friendly to communities of people owning complex software by sharing work now, but neither was it then. If you believe it was all wrong, an incorrect formulation, then disregard it and do not despair to move on. If you think ESR got something right that nobody can see anymore, then your hope should be rooted in the knowledge of how much less than what's possible we are currently achieving