if you are not familiar with the term "ping", it works like mentions "@" do on instagram. you "ping" the user to a thread, or in a reply and they get a notification. this also works with quoting on other forums (but they get a notification), which CS already has
it seems strange to me that, ChickenSmoothie, as a forum focused website doesn't have a reply or ping option? every single other forum i've been on has this feature
if changing usernames is an issue, or multiple users having the same username, profile IDs could be used instead, (eg. mine is 820347)
is there a reason this was left out for so many years? is it a server problem? doesn't seem like an issue on other forum sites, including FlightRising which receives just as much popularity as CS does.
"notifications" could be sent in a user's PMs, or by email if they opt in.