Simultaneous Ardour 2 (bugfix only) and 3 releases
a little idea that might be wayyy too ignorant about the development style and resources, but it came to my mind:
Some time ago, there was a discussion about midi in Ardour, and some few people even rejected the implementation of midi because they don't need it and feared new bugs.
Other people can't wait for midi to be usable...
Now at some point, Ardour2 could become a "bugfix" only branch, where updates only fixes bugs and don't implement any new features. I really like the updates coming along, but they always mix bug fixes with new features (that could include new bugs).
At the same point, Ardour3 could be released as a bit more unstable (still stable) but with much more up to date features.
This would mean real releases (not svn) of both Ardour 2 and 3 side by side where people could go with the ultra stable "old" Ardour2 or the cool midi Ardour3.
You are allowed to beat me for this idea, because it probably would consume more time and won't be possible and maybe even unwise.
Even so, it's my idea for Ardour that came to my mind under the shower :)