Robin Rendle explains why he thinks it’s worth blogging:

Ignore the analytics and the retweets though. There will be lonely, barren years of no one looking at your work. There will be blog posts that you adore that no one reads and there’ll be blog posts you spit out in ten minutes that take the internet by storm. How do you get started though? Well, screw the research! A blog post can anything, a half-thought like this one or a grandiose essay with a million footnotes. It can look like anything, too: you can have a simple HTML-only website or you can spend a month on the typography, getting every letter-spaced part of it just right.

There are no rules to blogging except this one: always self-host your website because your URL, your own private domain, is the most valuable thing you can own. Your career will thank you for it later and no-one can take it away. But don’t wait up for success to come, it’s going to be a slog—there will be years before you see any benefit. But slowly, with enough momentum behind it, your blog will show you the world: there will be distant new friends, new enemies, whole continents might open up and welcome themselves to you.

Or maybe they won’t. But you’ll never know unless you write that half-assed thing that’s in your head right now.