The way I see, Leica is good for street photography or some dialogue-type of portraits.....story-telling in other words. I am an amateur photographer and I do portraits 60% of my time, landscape 30% of my time and street about 10% of my time. Do not see myself doing photography as a business, so for me it will always be hobby. The Monochrome with 35 or 50 mm lens is appealing to me and at some point of my life I would love to have one, on top of my normal DSLR system. For this to happen, I will need to be very-very-very reach as it would cost about 25.000$ for a body and 2 lenses. I should probably be earning 5-7 more than I do now to be able to afford with a blink of an eye. This is the reality. Sadly...it is something that it outdated after 5 years....might be not the lenses, but the body.
I guess Leica will be the benchmark....but I only hope other system will dramatically improve...like Fujifilm with their X-Pro line or Sony. When I will be able to afford Porsche or Ferrari....it means I can afford Leica
I think it was better during films days. You get a body and a lens and 10 years later it is still using same film
Today 10 years in like eternity....everything changes and improves so fast. Especially sensors, LCDs, other things.