Eclectic Light:

Despite extensive coverage of much of Big Sur and Apple Silicon, one session was missing from WWDC, that detailing changes in APFS for macOS 11. This article can’t be as authoritative, but I’ll try here to outline some of the improvements which are documented in various sources, including the latest update to the APFS reference documentation.

APFS in macOS 11 changes volume roles substantially.

I’m hearing about this being an issue for people so stay informed about the changes Big Sur can make to your system.