The first integrated circuit was made in 1949. It was not till much later that it dominated electronics.
You forgot the very best application---cat toys!Possibly the laser? From its invention in 1960 it took quite a while before a commercial use was found for it in media players and supermarket bar code readers.
Amel brand yachts used to be 45° degrees in year 2000, now the latest ones are 30°. Source: watching too many SV Delos videos.How about the combination of features that allow modern sailboats to sail relatively fast at 45° against the wind? Until fairly recently most sailboats used rigs and hulls which were optimized to sail downwind. This is very efficient for moving lots of cargo, but it isn't great when you want to go somewhere on short notice against the wind.