If it's true that the Lux Classic is now being made overseas, then why haven't they took the American flag off of the Lux Classic from the website? I know it was on the Lux Heavy Duty upright for a short while until they took it down. Maybe they haven't yet but they mean to, I'm not sure.
But I do have to respectively disagree with you on one thing, the Perfect or the Clean Obsessed don't appear to be cheaply made over the Lux Classic. Actually they appear to be much better machines than the Lux Classic in my honest opinion since I have used all of them before. Same with the Lux Heavy Duty upright which is the same thing as the Perfect DM101, I like those better than the Lux's own commercial upright. I still really like the Lux Classic, no doubt about it. But I would MUCH rather have the Perfect or the Clean Obsessed instead.
Regarding the Guardian Platinum, either they went with white because it was cheaper to make. Or the company that makes the Guardian Platinum was no longer making black body parts on the canister unit. There could be a ton of other possibilities.