The United States Navy has an absurd number of uniforms styles - five, at least - and they are updating each version of those, at least annually. They are always sending out questionaires to sailors about them, because they genuinely want them to be comfortable and for the sailors to feel proud wearing them. It is not at all unrealistic to think that STARFLEET would've done the same, but I don't really care for the uniform patterns from DS9 onwards. I thought the turtleneck dickies or whatever they're called looked really bad. Honestly, I'm a big fan of the original uniforms seen in TNG's first 2 seasons. I would've been happy if they kept that.