It’s relatively easy to write and speak about new technologies. You’re excited about them, and there’s probably an eager audience who can learn from what you have to say.
It’s trickier to write something insightful about a tried and trusted (perhaps even boring) technology that’s been around for a while. You could maybe write little tips and tricks, but I bet your inner critic would tell you that nobody’s interested in hearing about that old tech. It’s boring.
The result is that what’s being written about is not a reflection of what’s being widely used.