Haven't read the book, but here are two (notably harsh) reviews:

https://marxandphilosophy.org.uk/reviews/17006_fully-automat...

- Bastani claims scarcity is the central question in economic thought. This is a neo-classical formulation, and is not in line with the central questions of political economy that Marx's writings (who Bastani obviously references liberally) grapple with. This leads to some theoretical and historical errors

- Bastani does not have a strong grasp on the labour theory of value, or at least doesn't subscribe to it in Marx's formulation. Bastani believes you can have profit without human labour input, where, under the labour theory of value, the exchange of labour is _the_ source of all profit.

- treats the move from late-capitalism to communist utopia as inevitable, and doesn't really grapple with strategic concerns, building class-consciousness, etcetera

https://theecologist.org/2019/may/29/climate-communism-and-a...

- The project is part of a long line of Marxist 'technologically deterministic' theories and proposals. Basically that capitalism will lead to its own demise through the internal contradictions that define it.

- the reviewer is skeptical of technological solutions to climate change, and Bastani's work relies on this heavily

I like the line at the bottom of the second review that describes this book as 'soft science fiction'. Something to shift the Overton window, but not something that provides much actionable insight.