Future of lens technology
Do the lenses prices reflect how complex to manufacture them?
or it is based on profitability and supply-demand analysis?
For example, 18-55 F/3.5-5.6 lenses are good yet cheap.
But 16-85 (same aperture) is far more expensive.
35 F/1.8 is cheap but 28 F/1.8 is way more expensive and so on.