This, of course, is true. I could always put the original components back on it. But that's not my question. Many of you buy, refurbish, & sell classic & vintage bikes all the time. If you had a desirable high-end bike, do you think that you would get more for it in as close to all original condition, or with modern upgrades. If I see a vintage bike in near mint condition that matches what it would have looked like rolling off the show-room floor, my eyes widen. If I saw the same bike with modern components, I would see it as just another bike with a nice old frame. For example: I used to have a Miyata 1000 with all original components except for tires & saddle. I thought about upgrading it, but several on this forum suggested that it would be more valuable left alone with original tires & saddle.