Please do not spam about packagefs in every topic, use separate topic like this.
Considering BeIA SDK, it is nothing strange that it not run properly in Haiku, because it is private unpublished software and it may use undocumented OS features. It is not useful by itself because it can’t be freely distributed and contains no source code. But it has historical significance and can have interesting architecture solutions that can be used in new software, for example Binder like scripting support can be added to WebPositive.