This definitely seems like at least half of it.

With blogging platforms, an additional aspect: I don’t really care to read the opinions of people who are mostly interested in blogging about a topic. I want to read from actual practitioners. As soon as a platform becomes well known, the non-practicing bloggers show up and it turns into a crapshoot whether what I’m reading is first or third hand information.

And that’s during the early still-OK-ish phase. After a while the natural tendency is that the non-practicing folks will produce more content because they’ve got more spare time!