The Debian Project continues to work on the unstable
distribution (codenamed sid, after the evil and "unstable"
kid next door from the Toy Story 1 who should never be let
out into the world). Sid is the permanent name for the unstable distribution
and is always 'Still In Development'. Most new or updated packages are
uploaded into this distribution.
The testing release is intended to become the next stable
release and is currently (as of July 2024) codenamed Trixie.