njee20; you seem like the sort of person for whom Di2 is ideal. But I must take issue with your claim that "it offers benefits to all", as I simply don't see how a relatively very expensive system is of any real benefit to anyone but professional racers and those with relatively high levels of disposable income. I hardly see how an expensive proprietary electronic gear shifting system would be of benefit to someone say in rural Africa or India, people who would need a bicycle for transport etc. And There are an awful lot more people like that on this planet, than 'Weekend Warriors' with loads of spare cash to splash on toys.
the "resource exploitation" derived from the development of the entire XTR Di2 groupset is probably about 1/1000000000th of what China do on a daily basis.
You have to see the bigger picture. It's still adding to consumption and exploitation of resources. Something we're constantly told is bad M'kay.