The question I get asked most about cropped jackets is whether they actually work on a shorter frame, given that cropped on a tall woman can mean sitting at the natural waist on someone smaller. The answer is mostly yes, because a cropped jacket is doing its job by hitting above the hip, and on a petite body that often happens without any alteration at all, which is rarer than it should be.
A cropped jacket earns its spot for the in between weather, that stretch from early spring through to a cool evening in summer, when you want something on your shoulders but a full length coat would be overkill. It sits well over a dress for an occasion, works over a plain top with jeans for everyday, and is the thing I reach for when a blazer feels too formal but a cardigan feels too soft. What separates a good one from a sad one is mostly in the shoulder and the fabric. A boxy, structured jacket needs a bit of weight to it, a proper cotton drill, a wool blend, even a heavier ponte, because thin fabric on a short boxy shape just looks like it shrank in the wash. Cheap ones tend to go for a fused lining that bubbles after a few wears, and buttons that are glued rather than stitched through, so have a feel of the inside seams before you commit. A good lining, even a basic polyester one, should sit flat and not pull at the armhole when you move your arm forward, which sounds like a small thing until you're reaching for something on a shelf and the whole jacket drags with you.
Mine have all behaved differently depending on what they're made of. The cotton one creases if you so much as look at it but shakes out fine and gets softer with every wash. The wool blend one needs an actual trip to the dry cleaners or it starts to smell of whatever room it's been in, which I learned the hard way after a very smoky pub garden. Ponte ones are the easiest, cool wash, drip dry, no drama, though they can go a bit shiny at the elbows if you wear the same one on repeat for a whole season. Whatever it's made of, keep it on a proper hanger rather than folded over a chair, because the cropped shape shows every crease at the front in a way a longer jacket hides.
Given a bit of time, a decent cropped jacket softens at the seams, the shoulder gives slightly to how you actually move, and it stops looking new in a way that suits it rather than ages it badly.