Campagnolo went through a very rough period in the late 80s and 90s, when Shimano managed to corner the market with their successful indexed shifting and aggressive marketing to OEMs. It wasn't just Campagnolo that suffered; almost the entire French bicycle component industry was on the ropes. Simplex, Huret, Maillard, Nervar, CLB, MAFAC, etc. either went belly-up or merged with other companies to survive. TA and Stronglight managed to hold out. Campagnolo almost went under as well, but by shedding all but the racing components managed to pull through. I think that experience has made them reluctant to diversify out of that niche.