This is essentially a definitional issue - do you define it narrowly, with multiple sequential revolutions along the path of industrialization, or broadly, with

This is essentially a definitional issue - do you define it narrowly, with multiple sequential revolutions along the path of industrialization, or broadly, with multiple phases? The facts are the same either way. Personally, I prefer the latter view, on account of how the various stages interacted. Water-powered mechanical fabric manufacture greatly expanded the use case for rotary-output steam engines, and both technologies took off synergistically when the latter became available with sufficient efficiency. Mechanized manufacture greatly expanded the use case for mechanized transport...