An ad hominum attack and a distinction without a difference is a hell of a response to "who is this guy".
Do you want to show the class where on your wallet the Keynesian model of economics touched you? (Or do you perhaps have a "Krugman sucks and you shouldn't listen to him" link you'd like to share?)
I don't think it's often useful to react to contrary evidence as special case exceptions.
The "tragedy of the commons" is a real thing, but it's also literally what "the cathedral and the bazar" is about. I would argue that the awareness and intentional action made based on either side of this mode is why technology seems to behave differently from other areas of human society.
Generalizing from the specific, I think it's more helpful to say "things tend to change randomly over time, and people can be resistant to sudden change which is not obviously better."
Since random change is more likely to be a change for the worse than a change for the better, societies will have a tendency to slowly become worse as time goes on. But the worse something gets the easier it is for people to discard it, and since intentional changes for the better are so often deliberate they also are often improvements to the best of what came before.
Enshittification occurs more as a deliberate act to increase revenue or decrease cost, which is a whole different ball game.