Now the topic will be bolded in the topics list, saved in your unread inbox, and show in your notifications menu.
You can access your notifications menu by clicking on your avatar at the top right of any page. Notifications are shown by default. Or, click on the bell icon.
The only thing I’ve noticed is that defer bases the notification on the last status update from the thread. So, if the last thing that happened was a like then that is what shows in your notifications.
I expected the notification to be based on the last reply.
So, sometimes, you have to look for (or ignore) a random notification if you want to keep the thread highlighted in your notifications.
On one thread I was experimenting with, Discourse picked a random moderator edit. So my notifications had the moderator’s name with a pencil icon. And clicking on the notification brought me to a random edit (not the last one). This was confusing. In a case like that, you might opt to bookmark the thread (with a note) if you needed something more than a reminder.