Based on Debian. I’m a bit confused though because I’ve been running a Bookworm-based version of the Raspberry Pi OS for some time (I switched from Bullseye maybe a year ago) because I thought that was the current version. Is this a second Bookworm-based release, or did I inadvertently jump the gun and run something that was pre-release until now? The Pis did receive some kind of big distribution upgrade this week, but it was from Bookworm to Bookworm.