https://www.debian.org/releases/stable/amd64/release-notes/index.en.html

This new release comes with a lot more software than its predecessor Buster; the distribution includes over 11,294 new packages, for a total of over 59,551 packages. 72% or 42,821 been updated and 9,519 or 16% of the previous packages have been removed for security and various other reasons.