I think you recognize a fundamental problem and yet do not address it.

Superseding an entire industry consolidates the economic weight of that industry into a smaller, more captive market. A capitalist push towards post-scarcity won’t work because the capitalists will always be motivated to implement artificial scarcity to protect their profits. Look at the current cost of computer hardware for one example.

A revolution of some sort would still be needed to truly make a post-scarcity economy, otherwise the fruits of those innovations will remain limited to the hands of the few.