The problem with not implementing notifications is that when they are useful (instant dispatch software), they are not implemented. But honestly I’d just spin up a telegram or email bot, if clients were not brainwashed with tekhnology. Messages and email are notifications. It is also a matter of minutes, opposed to creating a stupid service worker client-server-like runtime and trying to get things right without any test mode (long story short, implementing and debugging webpush requires publishing every change to a certified https host). There is even an entire company that sells you a properly configured webpush as a service. That’s just stupid.