I'm with you. I've never found the "used by $BIG_NAME_COMPANY" to be influential for me at face value. But anecdotally, I think that level of marketing has been effective in getting devs to bring them up in that context. I've heard in meetings throughout my career, devs saying: "It's good enough for $BIG_NAME_COMPANY, it'd be good enough for us". That alone has influenced decision makers to at least consider it.