The thing that gets some people upset is when you've invested huge sums of money in the glass, and then they "hold back" on the camera. Can/Nik almost have a duopoly in terms of market share. I believe these two companies have 90% of the dslr market, so it's not like buying a car, or TV, or new golf clubs. Once you buy in with the glass, you hope that "your company" makes a tech leap or strives for excellence in some way so that you have a residual long term benefit.