I still see a "Category" panel on the right-hand side, and clicking on the name of a category (like "Things I won't work with") seems to show posts just from that category.
Not all of them are titled "Things I won't work with", but others seem still on-theme.
I've read I think all of them before, but they're fun to reread here and there.
His other writing is similarly great, but much of it is for a far more chemist audience.