Jarda promised to adjust ergonomics to support ProjectConvertorFactory.
Integrated into 'main-silver', will be available in build *201411210001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Svata Dedic <firstname.lastname@example.org>
Log: #248615: the test should ignore ProjectConvertorFactory for now
Some people seemed to have a feeling that failing test in ide.ergonomics does not mean anything. Actually, issue 248887 shows it does. The test indicates that there is some part of functionality in the system (a way to recognize project folders) that ergonomics is not aware of and which will not be enabled when running in ergonomics mode.
As far as I remember Jardo you promised to take care about project convertor in the ergonomics & also rewrite ergonomics to use project convertors.
The test itself has been properly fixed as part of issue 24887. The question whether to use ProjectConvertor as implementation of FeatureProjectFactory still remains. Btw. for that I would need documented layer API, which I described at: http://hg.netbeans.org/ergonomics/rev/c14c5579baae
Unless there are problems found with current duality, I don't think there is much need to try to solve it. Overall everything seems to work fine from my perspective.