[The Toad]

SLR/DSLR lenses hold their value. Now that the pixel counts are higher than most consumers need or will ever really use, the is less of a reason to upgrade. I spent about $1700 on my camera body 3 years ago and I have no desire to upgrade, unlike the DSLR body I had prior to that that cost about $900.

[SWAMPSNIPER]

I've got some 40 year old manual focus lenses still like new. I use Minolta AF lenses from 1985 all the time.

Digital camera makers don't make a lot of spare parts, after a few years you're out of luck.

[Melas]

You will. The technology now exists to create cameras with usable film speeds in the millions. Eventually it will become affordable. The possibility to freeze any moment in time, under any light, with perfect clarity will render your (and my own) SLR absolutely obsolete. And then there are the cameras of the future that aren't digital facsimiles of film cameras, as our digital cameras of today. It's going to be a new world for photographers.