Do you have to @mention people on their tasks?
When you comment on a task that is assigned to someone else, do you have to @mention them, or will they get a notification by default?
Task authors and assignees "follow" their tasks by default, which means they will be notified based on their own notification preferences. They will see the update in the activity stream and per their email notification settings.
The only other piece to this would be of benefit is if someone @mentions you, and you don't respond, you will start getting automated emails telling you so if you have that email notification setup. I have been saved a number of times by that feature :) It is located under the Product Reminders heading of the email notification menu.
@Michael That email had definitely helped out my memory a few times too!