Crossover thought: on another thread discussing an annoying worrywart article about thrift stores and Kids These Days and capitalism and whatever the fuck else, I mentioned how my own extensive thrift-shopping experience compares to what the article claims, specifically how the clothing pieces I seek out compare to those sought by the fashionable teens and 20-somethings in the article -- short version, there's definitely some differences in my current overall "look" and style compared to "the look" for high school/college-age women (although their tastes, according to the worrywart article, do include a wide array of "vintage" clothing items from the past half-century or more), but in addition to some unique vintage pieces, I also have and seek out some other items which a fashion-conscious young woman my size might want, and could integrate seamlessly into her own wardrobe, because as I noted, "For basics like "solid black pants" or "solid blue long-sleeve button-front shirt," there's not that much style variation between various age groups or time periods anyway."
That's true if you're talking about, like, contemporary American history, especially from the 1960s to now -- if you're looking at a basic pair of long black pants or black/blue jeans, especially worn under an untucked shirt or a jacket long enough to hide any distinctive labels or back-pocket details, plus hide exactly how high or low the waistline is -- provided the pants are all in equally good or bad condition, I doubt the average casual observer could tell much difference between identical-fabric black pants from the 80s, 00s or now, nor between black pants sold in a teenage/20-something store and identical-fabric black pants marketed to older professionals.
I mention this because I was recently watching one of those TNG episodes where Picard was relaxing in casual clothes -- not his red-and-black captain's uniform but that weird "two loose pieces criss-cross in front" shirt which does at least get credit for breaking the rule I just mentioned about how solid-color shirts look pretty much the same across recent decades, but that shirt also looks very impractical, and I don't see how it would offer its wearer ANY advantage over the various "top-half clothing" options available today: button-front/front-fastening shirts, and pullover shirts or tunics of varying lengths and cuts but just the one fabric panel in front (even if that one panel is made of individual cloth pieces sewn together), rather than two loose overlapping panels. (IIRC, you never see any Enterprise personnel try bending over while wearing such a shirt.)
Having Starfleet wear one-piece jumpsuits works on two levels -- the fictional need to make their clothes look "futuristic"/obviously different from ours, but also, on a practical level, it's perfectly feasible that Starfleet or any other 24th-century "our members must wear uniforms" organization could mandate form-fitting one-piece jumpsuits, given that they have mega-advanced computerized replicators that presumably can make you a new, customized, perfect-fit uniform every day. (I don't recall if they ever mentioned: do they wash dirty clothes in Starfleet? Or do they put dirty clothes into a recycling bin and have the replicator make clean new ones?)
'Twould be ridiculous for our own modern military or any other uniform-wearing organization to mandate one-piece suits* that are also expected to fit well, because with current mass-production technology, it's fairly easy to mass-produce individual shirts and pants in sufficient variety that the majority of people -- those who are not statistical outliers, size-wise -- can mix and match to find a combination that fits well. But it would be a lot harder and more expensive to mass-produce well-fitting one-piece suits with today's technology, so "uniform" organizations don't mandate them. (*Yes, things like flight suits for Navy fighter pilots are one-piece, but fighter pilots are a much smaller population, who come in a much smaller range of sizes -- and besides, the flight suits are often baggy and "ill-fitting" anyway.)
However, today's mass-production technology is more than capable of making those weird Star Trek floppy-front shirts with the two panels crossing in front. The reason no clothing manufacturers have bothered to do this is because there is absolutely no reason anybody would want to wear such a shirt over the currently available options ... unless they're characters in a science fiction show whose designers are desperate for ways to make their clothes stand out from what the viewing audience sees in everyday life.
"Myself, despite what they say about libertarians, I think we're actually allowed to pursue options beyond futility or sucking the dicks of the powerful." -- Eric the .5b