Native built in web push notifications

My idea is: To not rely on a 3rd party service to deliver push notifications on all platforms but to have that built in. It would be the mixed martial arts of marketing-automation and be scalable until your server gives out.

I think these groups of people would benefit from this idea: Everyone

Why I think they would benefit from this idea: Not being limited by 3rd party service OneSignal

Any code or resources to support this idea:

Are you willing to work on this idea?: No, I cannot

What skills and resources do you need to explore this further? None, it is a feature request I cannot fulfill myself