[hyperpallium2]

It takes time for an industry to absorb technologies that require changes in behaviour, organization and values. Even longer if multiple industries are involved, general physical infrastructure, institurions, and consumer culture.

Perhaps even related to a human generation, or even living memory (like physics progresses one funeral at a time). Though the inflection points found lack that duration-scale and periodicity.

Just on curve fitting: you need some penalty for each extra line (noisy data can always be "fitted" better to enough lines). I expect the paper has a large section on this issue of statistical significance, but I can't access it.

I do feel it's kind of hard to say if such a pattern is "really" there, where exactly the breaks are, or if it's just a noisy artifact.