The blog is now the Changelog
The page listing what's new in Demiurg, release by release, is now called the Changelog and lives at demiurg.app/misc/changelog. Old links still work.
These posts have always been a list of what changed in Demiurg, so the page now says so: the Changelog link at the bottom of every page goes to demiurg.app/misc/changelog.
Links and bookmarks to the old blog address still work: they take you to the same post on the Changelog.