One profile should not have to be rebuilt on every site.
That is how the same person turns into five slightly different bios, five different product lists, and five different versions of what the work is.
The profile engine is the foundation.
Andrea in Public can show the public build log. Building Empires can show the operator profile. Stores can show products. Experiments can show what is in motion.
The source should stay clean underneath all of it.
That is the lesson: one profile can become many views when the foundation is clean.