I don't like that caniuse by default shows only several recent browser versions, deceiving developers and making it look like some new technology is supported everywhere. It is clearly a "dark" UI pattern that motivates developers to make sites viewable only on latest Macbook.
Instead, it should show the year since which some feature is supported.
I actually like how it currently works because it doesn’t matter if Chrome 32 didn’t support feature X because no one is using it. The boxes are sized by their current usage and aligned based on the stable version.
It’s a perfect chart to show your boss when someone complains about Firefox 4 not working. Clearly that person missed a few updates :)
That being said, I would like a year on each column for the occurrences when time/year is relevant. Currently I just Show All.
Instead, it should show the year since which some feature is supported.
For example, for flexbox it could write:
IE - never
Edge - since 2015
Firefox - since Mar 2014
Safari - since Oct 2013
Opera - since Nov 2012
etc.
This gives a better picture.