Also no sport coat should look like an orphaned jacket, if it's your thing to not look like you are too poor to own both. Patch pockets, gold buttons, elbow patches, leather buttons, etc., there are a lot of details that have been used to distinguished a jacket as not part of a suit. If you want to see some great striped jackets and suits, watch old movies, esp. old gangster movies. Stripes are always used to distinguish the criminal (yes they wore striped jumpsuits before the bright orange, so this was an obvious hint for an costume director). And also the tacky, the nouveau riche, and the young and clueless. And for sure few men of "taste" bought striped odd jackets in the second half of the twentieth century, unless they had a sense of humor and wanted something "loud." At some point the idea developed that stripes, and esp. muted ones, like pinstripes, only looked good in suits. And then it would be your fourth or fifth suit and you'd be a guy with that many suits (banker, lawyer, etc.) and your stripes would be muted. And still they put criminal bankers or moneymakers without morals into striped suits into 80s. Nowadays a lot of striped odd jackets look like orphaned suit coats because they are orphaned suit coats. No patch pockets, no contrasting buttons, no elbow patches, and they are made of the same weight fabric as we find commonly on suits. Either they were purchased at a thrift store and had been part of a suit, or they are sold by someone like Target or Men's Wearhouse as "separates." It's not just the stripes that make them look like orphaned suit coats. Really there's no good reason not to wear stripes if you like them. The fact that there is a pretty forgotten history to them is not going to affect the perception of you by the general public.