Yep. It's just too easy to hijack a post on accident. One solid and accurate comment that is only tangentially related to the post can turn the entire comment

Yep. It's just too easy to hijack a post on accident. One solid and accurate comment that is only tangentially related to the post can turn the entire comment section away from the topic at hand. Even if you want to say something about the topic at hand, without collapsible comments (especially on mobile), it becomes difficult to figure out how to insert back into the original discussion.