Which may well be a consequence of lazy developers taking advantage of faster internet. I'd bet if internet speed were to stop increasing today it would be more likely to solve the bloat problem, since developers would eventually realize they were ruining their UX with load times. It's the same with processor improvements in that they allow developers to write more inefficient code since their time is prioritized over CPU time.
In just the past 3 years, the average size has more than doubled.