I haven't typically had a personal website/blog dedicated to technology (I had a personal site for a while about a variety of things, but it was pseudonymous).

I haven't typically had a personal website/blog dedicated to technology (I had a personal site for a while about a variety of things, but it was pseudonymous). But I do have a history of contributing to technical company blogs. So I can use that as a talking point here. As people have mentioned already - it proves you know what you're talking about. You send a recruiter a bunch of blog posts which are topically relevant to the job opening they have, that gets you somewhere quicker. As well I can confirm that writing things down is helpful for your own understanding. When you're thinking about how to improve the strength of the writing for people less experienced than you, you start to notice gaps in your understanding that you have to fill in before you hit "publish". I've never heard of any techies using their blog to get spontaneously wealthy like other types of bloggers/social media creators. But the biggest thing I think I've gotten out of blogging is making less work for myself. Sometimes, working at a software company there's common knowledge about how stuff works, and how to do certain things which doesn't become widely known externally. Sometimes it's something simple, like have a test case which illustrates and connects the dots between what's in the official documentation. You get blessing to publish that blog entry - and now that knowledge is out there for people to find. If for some reason, somebody comes to you with that question again, you can just redirect to your blog entry, where you've thoroughly explained it. I've had that save me time for sure - and I've heard that things I've written saved a lot of other people a lot of time.