A note on exponential growth. While you aren't looking, exponential trends simply EXPLODE.
When my career started in the late 80s, 10 Mbps Ethernet was so fast that it was shared among a lot of users. In fact, at NASA/Goddard we had on the order of 10,000 users on a single broadcast domain sharing
Today, we use 1 Gbps for low-end desktop connectivity and it's dedicated to each station - not shared anymore! In terms of my starting point, over 100,000 times faster but when you factor in the 10,000x over-subscription due to sharing - so really somewhere between 100 thousand and 1 billion times faster. Comfortably you could say that a dedicated gigabit is faster by a factor of 1 million compared to 10 Mbps being shared by 10,000 people.
Now, the boffins behind Ethernet are pushing for 10 terabits per second Ethernet (10 Tbps) networks by 2025. That's 10,000x faster than 1 Gbps of today. At work we use 100 Gbps today, but that's only used for really fancy high-end networking gear where a single pair of line cards can cost as much as a house.
Nothing else, except maybe Moore's Law, can approach a technology that can scale by a performance factor of 10,000 billion (a.k.a. 10 trillion or said another way: 10 million million) in 50 years. It's staggering.
Here is a summary of the history of Ethernet from 2013 (it's 40th anniversary): http://standards.ieee.org/events/ethernet/history.html