What a shitty plot. Here are the sins I count:
1. No y axis label.
2. It supposedly plots a “rate”, but the time interval is unspecified. Per second? Per month? Per year? Intuitively my best guess is that the rate is per-year. However that would imply the second plot believes we are very near to 100% adoption, which I think we know is false. So what is this? Some esoteric time interval like bi-yearly?
3. More likely, it is not a rate at all, but instead a plot of total adoption. In this case, the title is chosen _very_ poorly. The author of the plot probably doesn’t know what they’re looking at.
4. Without grid lines, it’s very hard to read the data in the middle of the plot.
There is no need for a 'rate' to be against a time interval. The conversion rate of an email is purchases / emails sent. The fatality rate of a disease is casualties / people infected. It really just means a ratio.