> But, the reality is probably that PG is just super busy and does not have the time and bandwidth to build features out.

I totally get that, it's the reason I mentioned the 7-year time window though. You'd think that something like that would've been done at some point during all that time by some interns or something by now, even if it was a super low priority. I'm guessing that "if it ain't broke, don't fix it" philosophy must just be really strong with PG in that case. Or possibly have some deeper reasoning like you mentioned.

> Reddit does not send notifications on comment replies either.

It doesn't send out notifications to your email or whatever, but it does still have a little inbox notification that lights up when you get new replies. Does something similar to that get unlocked here with enough karma? If that's the case, then I wouldn't know...