Campagnolo ruled the roost for postwar racing bike componentry into the 1980s.
Many of their top components were eye-wateringly expensive.
I remember one old fella telling me his record derailleur cost over a weeks wages
The transition of expectations of performance, materials, aesthetics, compatibility has changed over the following decades.
Almost all of their aficionados, from racers to leisure riders to collectors, reach a point in this timeline where they stop buying.
I don't personally have any campagnolo of the 21st century, but on the right bike it still has its place -
But that place is still shrinking even now