I remember over the years this and earlier ("NOT TO BE NAMED") fora had this crowd gaga over various lenses; prices jumped, images abounded, trades were made on
The 35-75/ 2.8 R
The 135mm R "canada"
the C/Y 21/2.8
The 15mm R
the 12mm Voightlander for M
the 105-280 R
the 400mm 6.2 (sometime 560mm)
The "MATE" (that played Rodney Dangerfield until someone said 'better than the primes' and you couldn't get one for your first born )
Guess what; I have them all (except MATE - kept my firstborn instead) and use them all regularly (except 21.2.8 that is a bit overtaken by the WATE)
Those were the days of enthusiasm- and were not off base.
SO, what's now? Is it all going to be Medium Format? (until Guy rediscovers the DMR ) or is there still a Leica contingent snuffling out the gems of the past (one candidate, the 16mm)
Come on the R isnt really dead (I just saw a Pentax K to Sony/Minolta "convergence lens" adapter 1:1. Leica could easily make an R lens to S adapter, single elemnet, to adjust for the registration distance, or maybe I WILL!) I will put $10 that either that or a 4/3 camera, 20+ MP for R lenses)
The M is a winner, and can take R lenses.
There are TONNES of older M lenses. SO, what the next hot one??