Like any new term the (mis)usage broadens the meaning over time until it either it's widely known, it's unfashionable, or most likely; it becomes so broad as to be meaningless and hence it achieves buzzword apotheosis.
My old job title had "edge" in it, and I still don't know what it's supposed to mean, although "not cloud" is a good approximation.
"Edge computing" is a pretty vague term, and can encompass anything from a 8MHz ARM core that can barely talk compliant BLE, all the way to a multi-thousand dollar setup on something like a self-checkout machine, which may have more compute available than your average laptop. In that range are home assistants, which normally have some basic ML for wake word detection, and then send the next bit of audio to the cloud with a more advanced model for full speech-to-text (and response)
