Only SMODS do not develop. Well not unless the SMOD builder decides to "evolve". That happens when they feel their bank balance needs a top up. Just ask the 49er boys about rig changes and other mods....
One designs develop.. Have a look at first few year 505 hull and a "modern" hull or in fact an original T vs a "Marstrom" T.....Ok not as much perhaps as an I14 or moth but their hulls change. So if you dont like development but like water sports.. Ummmmmmm try swimming Im assuming you don't include your own "evolution" of body drag form....
As for cores.. we can talk about history of cores if you wish.. Sailed a few times on "Jennifer Julian" and Colour7... But it all comes down to diminishing returns.. But tell me what was the core of Prime Computer? What was the standard core at that time?
