Uber Eats and Drizzly spam my notifications (I know Android has very detailed/overly complex IMO way of managing app notification channels) but because they are native apps we don't complain.
Yes. I’ll bet there are many well-behaved web apps, with well-considered notifications and concise and simple options so that users get everything they want and little they don’t.
They are downed out by the firehose too.
Not via a push notification, no.
How does that intersect with browser push notifications? Another advantage of email notifications is that the email notifications won't go away if I don't pay attention to them for a long while.
In any case, I don't use Windows except at work, where this wouldn't be an issue anyway.
There is far too much already that bings, bangs, jumps and try to get my attention.