Is there something like that for hacker news? (a browser addon or some custom client).
From dang (mod) https://news.ycombinator.com/item?id=22788678
[0] Email from April 2020:
> New feature: when you visit a thread, the software now highlights comments that are new since you last viewed the page. These are displayed with an orange (or whatever your topcolor is) bar to the left of the new comment. Refreshing the page will reset these.
> This will only work when you're logged in with your account that has this email address (and which we've marked as an alpha tester.)
It would even help keeping the conversation alive when you can easily find a relevant reply nested 5 levels deep.
did a quick scan through the awesome lists and found a couple other options.
The minus sign is in brackets like this: [ - ]
After you click it, it says "x number of replies" basically (in the form of the number of replies and the word more).