...IMO, the color are somewhat gimmick-y, and I seriously doubt they will have any staying power...
Yet we really have absolutely no problem with the colors used in cars - a dealer's lot is a very colorful place, where, incidentally, colors change a lot from one model year to the next, yet we accept this without a thought.
Even domestic appliances such as refrigerators, dishwashers, microwaves, kettles, pots and pans, food mixers come in hundreds of colors.
We have overwhelming choices in the colors we paint our homes and offices, in the carpets and art we prefer, in the clothes we wear, in the gardening tools we have, in the packaging of food we buy, in the choice of fruit we eat...
Probably not an endless list, but really a very long one. And as much as I respect the opinion of anyone who doesn't like these iMacs because the colors don't appeal to them individually, I can't help but wonder why some (not saying you, just some) are so distinctly opposed to computers being anything but the same color as they have always been. Or the same form factor either.
And it isn't as if computers have always been the same color anyway. Early desktop micros were cream, or silver, or white. Then a color that over the years has yellowed into something quite unpleasant. Then beige, then 'platinum', then grey, then silver. Some were black, and some people decided to equate that with 'pro' machines, because that's how they were marketed and sold at the time, to help dupe a lot of people into spending more on a 'power' system.
Laptops went from such as my all-time favorite, the Toshiba T3100, which weighed about 20 pounds and was about as portable as a giraffe with a handle on its tail. Today, my regular laptop is an M1 MacBook Air. A gazillion times more powerful, a tiny fraction of the weight, far more portable.
Some (not meaning you, just some) are complaining that the new iMac is just too thin, and really doesn't need to be. And they're right in that it doesn't need to be, but then I don't need my car to go almost 70 miles to a gallon of petrol, but it does and I like that it does. My wife's car does 32 miles per gallon, and she likes that it goes a lot faster than mine does. Consumer choice is like that - it creates a market where different needs and preferences can be met, rather than just one.
Personally, I could understand the complaint that the new iMacs have bad color choices if it weren't for the fact that amongst them is silver. The self-same color the last generation of iMacs have been, so even those who don't like yellow, blue, green, etc can still have a computer that is the color they prefer. But now, so can we.
But I would agree these colors are a bit gimmicky, and I suspect they won't have much more staying power than the colorful G3 iMacs did, but that isn't really the point. When Apple made those, just like these, they gave consumers a degree of choice. I really, personally, don't see how that is a bad thing.
Nor do I see it as a bad thing that people who don't like them can say so. The fact is that you, and everyone else, have a choice, and you're entitled to express it as much as anyone. Just as everyone else is entitled to reply.