There's still quite a lot of work to do to get the
new installer ready
for 1.17. I think we should focus on that, and avoid expanding the
scope of the project until we've reached that milestone.
There are the issues discussed here:
http://www.mediawiki.org/wiki/New-installer_issues
and more will become apparent as more testing is done.
If the new installer is not ready to replace the old installer when it
comes time to branch 1.17, I will move it out of trunk, back to a
development branch. Hopefully that won't be necessary.
-- Tim Starling
We should probably ship both installers in 1.17. I wouldn't be surprised
if it some odd configurations in the wild made it not work.