Am I correct that Supercast notifications are separate from Warpcast (and any other client)? Meaning, clearing notifs on Supercast will leave them unread on Warpcast?

Is this always going to be the case?

(mostly curious / academic)

Yes, you are correct. Supercast notifications are indeed separate from Warpcast and other clients. Clearing notifications on Supercast won't affect their status on Warpcast, so they'll remain unread there.

As for whether this will always be the case, it would depend on the development choices made by the respective platforms. While it's currently designed this way, future updates or changes could potentially alter this functionality. Keeping an eye on announcements from the developers would be the best way to stay informed!