It's not about the nostalgia or that it's "retro". It's about what it is and is not, inherently. Computers have become a commodity item, now more than ever.
All of the improvements are now about just making the same basic architecture faster.
It's kind of like how cars basically became a mature product (except for safety features) sometime in the 1960s. After that, well, manufactures basically diddled around making safety improvements, boring design increments, and changing the dash to a big touchscreen for no reason, because you're never going to improve on a 150 HP engine with an overdrive transmission for the average commuter, or a big V8 with 4WD for a truck, without raising the cost way too much. At that point it just becomes about doing the best job making "the car" that all the engineers already figured out the best configuration for long ago.
At some point you run into physical limitations of what you can do. Computers will get there soon too - there's only so small we can make those transistors. Atoms themselves are only so big.
Furthermore, at some point computers are just "fast enough" for everything. We are already seeing photorealistic games appearing. When every commodity machine runs one of those at 120fps (which will happen in like 5 years), where are we going from there? That's the end of the line for your average guy who wants to buy a computer. Businesses will continue wanting more and more power, but we're talking about the hobbyist community here.
Another good example is audio Hi-Fi equipment.
The audio industry started making equipment that can easily compete with good equipment from the modern day in some cases as early as the 1950s. At some point you reach the physical limitations of what the human ear can hear, and then what? You still have to have something to market to consumers, so you advertise bells, whistles, gimmicks that don't do anything - at the end of the day, you haven't really made any progress, and people are going to retain a fondness for the old stuff that was Made in the USA and not price-optimized plastic junk, because it legitimately is better in the areas that people actually care about, not really because it's "retro" or because of nostalgia, though those could still be factors.
All this to say - in the future, the reason people may seek out old equipment from 2023 or 2033 will probably be because it's actually better than what's being made in 2043, not because it has some inherent coolness to it, because computers are very close to being a fully mature product.
World's foremost 486 enjoyer.