the_zeus An extension that changes comments into threads that can collapse, just like reddit. It keeps comments organized and is easier to track threads you like.
tolgaaaltas the_zeus There's an extension for that called Evergreen (Kyrne) but it's not compatible latest versions of Flarum. You may consider opening aBounty for reviving the extension.
tolgaaaltas the_zeus By creating aBounty when an extension isAbandoned by its developer, you can ensure that another developer gains compatibility with the latest versions of Flarum.
Lumeinshin the_zeus you put money towards it and someone may pick it up in response. Here is an example of one that has high interaction FYI flarum take 25% of any money put towards an extension for hosting cost. Like with everything, you may or may not get a response or developer interest, thats just the nature of the game. I would say from looking at communities related to alternative forum software and such, nested comments is a desired feature by some so would probably be worth pursuing