Those are quite interesting graphs.

As with all squiggly lines, you can attach a variety of narratives.

One thing that jumps out at me is a division of technologies between those that are adopted in subgeneration time scales (internet, cell phone, etc.), those that are adopted on generational timescales (TV, microwave, etc.) and those that are slower than generational (phones, cars, maybe electricity).

Also, the starting points seem arbitrary to me. The internet was not in 30% of households within 5 years of its invention. I doubt the starting year for PCs as well. I think someone chose some arbitrary starting years to tell a story.