Some websites have been making disparaging remarks about the quality of newer Nikon lenses - so I would be interested to hear the views of those who may use them.
Is composite more brittle or likely to succumb to UV - or are modern composites every bit as strong as metal and as long-lasting - and with a 5 year guarantee and 10 year lifespan does it matter?
Is metal a better material or does it suffer permanent deformation when hit whilst composite springs back to shape?
Does the lighter weight of composite lend itself to steadier photos?
Does it not matter so long as the glass (and composite) is good?
And to reiterate the point - this is a photographic question, not an off-shoring question.