WP.org plugin site lacks one thing badly: A proper issue tracker. For example, users experiencing problems with my plugin have published their issues at WP.org forums. As the author, I don’t get automatically notified about that. Therefore that support requests don’t get resolved in a timely manner.

Plus, WP.org is slow when accessed from Germany. Setting a stable version’s number in “readme.txt” and copying “trunk” right after that is – counter-intuitive at least. You cannot publish sites with more documentation at WP.org – which is possible with Github.

Finally, if someone unknown wants to contribute to your works you get a patch either per email or have to dig it up from WP.org’s forums. Nope, that is definitely better implemented somewhere else. And GIT (or Mercurial, I am pragmatic here) the better tool for that kind of development than SVN.