If there was ever a truism it is that technology is rapidly evolving under our feet. What was right today, is likely to be sub-optimal tomorrow. This situation can cause a sense of paralysis leading to delayed action because next week the "Next Great Thing" is coming soon. With the advent of HTTP/2 (h2) that translates to holding off on optimizing your web properties. When you have large portions of your user base on h2 and a similarly large portion on h1, you need to double your efforts to keep up!
Don't be paralyzed. Optimize today. Enable Ion.