Kim wrote: This is one of the bug-a-boos in many concept cars. Conforming
to
safety specs may require changes in the concept car, which then
affects other features.

I'd expect that it is more dealing with a bureaucratic mind and the
interpretation of safety standards.  Try to do it in a new way and no one
will step up and say it's okay.  And rules/specs/standards written based on
the 'way it's always done' rather than objective standards that would allow
innovation.