In which case, I don't understand what problem they're solving.
We already have Experimental.
We already have Experimental.
"WARNING: Use of apt-pinning by a novice user is sure call for major troubles. You must avoid using apt-pinning except when you absolutely need it." https://www.debian.org/doc/manuals/debian-reference/ch02.en....
1) compartimentalized, not a big, global dumping ground 2) same builders network as unstable/testing 3) no need for a reupload to push to unstable/testing