Road cycling is very traditionalist. I can see high end calipers being offered for way longer. Custom builders will always exist in this segment.
Look at mountain bikes. The writing was on the wall with AMP, Diacompe, and Hope in the early 90s. By mid 2000s Vs were relegated to low end bikes where they still remain. Even cantilevers have a niche market still. Suspension frame design and less traditional baggage made the transition rather effortless. There was a year or two of front disc/rear V but its all disc now.
Hybrids have even less tradition than MTBs and the novice buyers are more dazzled by shiny disc brakes than lighter v brakes, even if the cheap discs suck.