[dmurray]

I definitely get unmutable notifications on Android from my first-party phone manufacturer bloatware apps, which is the equivalent here. Would I like to see the new Themes in the Theme Marketplace?

Pretty sure I've had marketing notifications on third party apps I couldn't disable without losing functionality, too. Separate notification channels might be mandatory in theory, but even if so, the Play Store is worse at policing that kind of thing in practice than Apple.

[Tijdreiziger]

Go to Settings > Apps and disable said bloatware apps.

If not visible in the list, turn on ‘Show system apps’.

[hipparchus]

That doesn’t solve the main problem mentioned above: that some notifications from some apps are useful, but they don’t let you fine tune which notifications are permitted and which are disabled: you either get everything, including the marketing / adware notifications, or nothing at all.