There’s no such thing like a primary topic or focus on mine. It’s an ongoing ever evolving side project and it’s topics change with whatever my hyperfocus latches on next 🙃
I know many separate their ongoing projects or thoughts via profiles or even completely different websites.
That’s too much work for my taste. So there is the full package or nothing. Or well… one could sub to a feed by category only. A nifty RSS feature 😀