Not that stable, not compatible with c2 memory management, not fully compatible wit some of c2 basic features, conflicts between scirra and ludei that finally lead to have the community itself take care of the plugin since ludei did not enough work from their side, better exporter for android, phonegap that will take the lead at the end for both iOS and Android, the surprising popularity of cocoonjs despite the fact it is kind of unstable, that updates of cocoonjs tended to be plain broken, and that scirra had to endure the support to their user since they were proposing it.
Now scirra will not have to take responsability if it is broken once again for a long time period.
I think that sums up it partially.