Faceted BRep is also often a good (albeit not parametric) format for arbitrary formed geometry, e.g. slanted walls, cracked beams or deformed slabs.
I don’t see any inherent limitation considering heritage. I experience limitations with the way modern BIM software libraries are focused on current-day libraries, products and materials (e.g. industrially fabricated bricks - with straight mortar lines; Steel & Aluminium profiles).