jaapv
RFF Sponsoring Member.
Spending money to gain only one or two stops seems silly when you could gain four or five stops with modest prosumer camera. Why not enjoy the film Leica and nice glass in moderate light and get a nice fun Nikon or even an m4/3s for shooting in the dark?
If you get the M9 you'll always pin for the 35 Lux ASPH and if you keep the M8.2 you'll always be frustrated. If they cause you angst kick em both out.
That is valid- if you are not interested in the way your images look. You might lose some noise, but you throw out the drawing of the Summilux (whatever version) and a lot of detail. Much better to improve your postprocessing skills to get the most out of your digital M.
You'll find it runs rings around any P&S at low light.