Related topic, though not the same :
Voyager app has a big blue button on the posts page, that leads to the temporary display of hidden posts (not comments).
This is really useful for many purposes, I guess. for me it is useful, because I have some kind of inbox zero approach. I swipe away (hide) post that I have seen and do not want to see anymore . But sometimes I still want to see them again. Then I just press this button.
Would be cool for PieFed, too! This approach could be applied to posts, as on voyager, as well as on comments, as discussed in OP.
