Yes it would make the manufacturer a fine pot of cash --- ONCE. When we all have a bike that never breaks down who do they sell a new bike to then?
Many consumer items, electronics being a good example, are vastly more reliable than they were years back with the result that manufacturers have to constantly come up with new wizzo ideas that we never knew we needed in order to keep making sales.
Exactly. And its not only that. Its also the fact that overengineering is too expensive. See aircraft part pricing etc.
BMW could certainly make a ceramic/titanium FD bevel gear system specced to a miilion miles. Whats the point? Their marketing tells them that the average current GS owner keeps a new bike for less than 30 months, doing an average of 25k km (i.e 15.5k miles). Fact.
Why engineer it for much longer? Why pay 3x in R&D to keep the tail end of the distribution (the ones who buy and keep for 10+ years or 60k miles) or the secondary market happy?
On the former count, (again this is factual internal marketing stuff) the owners to buy and hold for long are considered to be 1) a very much diminishing market (as people can afford to swap toys more frequently than 25 years ago and the products are a lot cheaper in real terms- same in cars really, do you think your 50k BMW 650i is designed to last more than 6 years? Nope) that will be obsolete in 10years and 2) good with a spanner in any case
On the latter count, the secondary market, this is totally my view/speculation I don't think it bothers them (the fact that bikes will wear badly) through second/third owners as it can always be blamed on the former owners misuse and in the long run push those secondary owners into the new market, which is where the money is for BMW. Add to this the fact that BMW is selling more bikes (by a factor of 17!! -fact) today globally that it was in 1990, then you get the idea of how much they care for older/second hand machinery and longevity.
Guys, its money. Money NOW, is what really counts in today's corporate world. BMW (or Honda) are no exception. The name made through longevity -as if machines were hemmed out of stone - does not count anymore. BMW, Porsche (compare todays 911 with the 80s cars), Honda, Mercedes, are all good examples.