I don't care. I'll be long gone; let's see, I'm 66 now -- Well, I might still be around at 96, but I don't really expect to be shooting very aggressively. Mr. Cardwell's point is well taken -- it would depend on a whole lot of good fortune. I'd bet on my M5, with the possible exception of the meter (will the batteries be available at any price?) I suspect that there will be a very few Leica technicians around, extremely expensive, because somebody has to take care of the collectors, right?
However, it all rests upon the assumption that humans will still be on this planet, and whether there even is a planet. I think the planet will probably still be here, but I suspect that the dominant species by then will be the opossum. Can a 'possum manage a Leica?