Just to be sure i understand (please bear with me):
I am a reader which is tracking 200_000_000 different topics, some of which started 10 years ago.
If i am conscious and read everything and have a clean_inbox, i will still get “unread notifications” from that topic started 10 years ago where nothing was posted for 8 years until today – and someone replies today, right?
This restriction applies only if i have topics which are in unread status for more than 90 days consecutively (beacuse i just don’t wanna read them and i also didn’t press the Dismiss… button).