I will try to Answer first with facts.
1/ According to the Active (published) Bazaar branches of Bazaar, we can see that there is 8 active development branches (changed since beginning of 2013)
2/ According to Bazaar 2.6b3 milestone, 3 bugs out of 12 are fixed for the next 2.6b3 release. This version started 6 month ago (August 2012).
3/ According to Bazaar v2.5 series, v2.5 series had a beta/minor release every month.
4/ According to Bazaar v2.6 series, v2.6 series has a beta/minor release every 4 months (well, there are not so many releases to give trends here).
5/ Bazaar is still used on prestigious/ambitious/large projects : Ubuntu, Debian, MySql , Launchpad ... projects that are active in the Bazaar community.
So the first observation is that releases are less frequent, clearly.
One may think it's bad trends, but one can consider that the application is now mature enough and that new road map (with new features) needs to be forecast.
To finish, here is an extract of a IRC chat I had with bzr team. This may point out the issue with intermediate release.
trident_job: Hi there. I've seen that latest bzr version is v2.6.2
and is 1 year ago (nearly).
trident_job: next version v2.6.3 still
have 3 bugs to fix ... do you think the project is stall ?
mmm: we lack anyone who's job it is to do the release these days
mmm: you're right that there's stuff on trunk that could have done with being
released a good while ago
trident_job: mmm: yeah, that's not good
advertisement for an open source project to have 1 year release cycle
mmm: well poked... so, probably an rt unfortunately
UPDATE 2013.09.20 : Bazaar retrospective from a dev.
Read especially the last two chapters :
- Bazaar on the slow track
- Conclusion