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we can safely deduct the campag years from this
lol
This R&D stuff still doesn't stack up to me; the cage, parallelogram, pivots , jockey wheels etc are the same and the motors etc have been developed by others and can bought for pennies.
Is the industry wanting to put di2 on sub £2k bikes or is it not interested in a price war? The same brands are happy to race to the bottom with their (eg 12 speed) MTB stuff
Mechanical derailleurs have benefitted from 75 years of R&D, so the sunk costs have been amortised significantly. The electronic versions have only been meaningfully developed for the mass market in the past 20 years, so the R&D costs are higher and will take longer to amortise.