I have a site, where I do posting, on an irregular basis[0].
I hesitate to call it a "blog," though. I suspect that my greatest fan is Yours Truly. I basically write for myself.
I have no plans to stop, but quite some time can go, between postings.
I do the same. I don’t even really show anyone my blog but I’ve written to it (or previous iterations of it) on and off for 20 years or so.
It’s nearly always just me writing about things I’ve built so I have a diary of my projects, or mini guides on how to do something technical so I can refer back to it if I need to.
I mostly/daily use Obsidian for the same stuff, but if I think something is worth sharing (even “potentially sharing one day”) then I’ll put it on my blog instead.