Globally Manage Users Notification Preferences
I understand the "profile & preferences" area within HubSpot is meant to be user-specific, meaning someone logged in to a HubSpot account as a user would be able to manage their personal preferences without alterting those of a team member.
That said - I think there is an opportunity to give admins / super admins control over their team and/or all users within an account, so they can ensure all team members are receiving key notifications to the places they need to receive them (and on the flip side, that there isn't too much noise from irrelevant notifications). The idea here is to give certain people within an account the permission necessary to make global changes to all users / groups of users to ensure everyone is receiving the notifications they need, without each user having to manually manage their own preferences.
Thanks for your consideration!