Follow specific comment & Replies

Could we add the option to follow a post/comment to be updated with notification for the subject of interest, for example I saw a comment by Shijun reference updating URL and publishing a page, would be great to have a follow option on this so if there were any more replies I could be notified and kept up to date as it’s something I would find useful. I know we have a favourite option but only for the original post rather than individual comments and if there were lots of unrelated comments to a post it would be nice to just keep up to date with the ones that were of value to the user rather than having by to scroll through every comment on the post if that makes sense