Unlimited Wardrobe: Played mostly straight – the flexibility is not unlimited, after all – by smart clothing, which can offer a variety of style modifications (via inbuilt MEMS), color changes, and other self-reshaping properties on the fly. (And, of course, at home there are cornucopia machines.) Played entirely straight by virtual clothing (which consists of an AR projection over a neutral gray jumpsuit or spraysuit, so long as onlookers are subscribing to the public v-tag channel and your coding budget is adequate.
MEMS
Trope-a-Day: Space Clothes
Space Clothes: Averted; even in space, people just wear regular clothes. (Sure, they have lots of pockets, but that’s not specific to spacer culture.) The only difference is that the pure-skirt option is eliminated for both sexes (because microgravity), and the cloaks have to come with MEMS and occasional microfan thrusters to let them manage themselves as people move.
And spandex is not used for regular, day-to-day clothing anywhere. Even not in space.
Trope-a-Day: Form-Fitting Wardrobe
Form-Fitting Wardrobe: While it’s not all tight-fitting – many clothing styles are perfectly loose and flowing – just about all clothing in the Empire and other advanced civilizations fits perfectly. That’s because it’s made to incorporate a whole passel of tiny MEMS, micromachines which ensure that it loosens and tightens and shortens and lengthens in all the right places to fit its wearer just that perfectly, no matter who they are or what they’re doing, as long as the size was approximately reasonable in the first place. It also never gets caught on things or trails in mud, remains stable in wind and weather, and brushes dirt off itself. It’s hard to avoid being stylish, really.
(This even applies to hardshell armor, but it tends to be modified to fit perfectly on manufacture, or on-the-fly with a handy nanolathe, rather than being self-adjusting.)
Trope-a-Day (R): Animate Inanimate Object
Animate Inanimate Object: Not to the full extent of this trope, but due to the impact of ubiquitous computing and the generally spime-ish and MEMS-ized nature of Stuff, it’s true enough to make the animists happy.