Anybody not using undercoating?

A few decades ago the major Mopar resto shops restored back to as like built by factory. If car came new with undercoat, they restored it as such. Used correct undercoat too! Otherwise, floor was primer, with overspray underside past rockers, etc. There was factory undercoat in various places under fenders, etc. Today, what 98% are done with bc/cc, bottom side of car as shiny as top side. We go from clones to restomods. Soon our old cars will be "restored" wit big batteries and electric motors! Progress!!!