To my opinion film is still better then pixels, i still hold on to my Leica IIIf and my Leica sl for serious work.
I used to have an M3 (early serie, double stroke transport, and glass film pressure plate), it had a hard life with me and wasn't cosmetically in the best condition, mechanically ok, but sold it for 1200 euro.
Nice thing with the Leica R lenses on a Canon body is that you can use them with an adapter, without losing infinity focus.
With the Nikons you would have to alter the lens mount on every Lens. ( because i don't like using adapters with correction lenses)
greetz len.