Hacker News Reader

Useless side conversations that spun off from the original email. Or even worse, when gmail smashes a message in there that doesn't belong in the thread at all.

Someone emails sensitive material that you don't want persisted (e.g a password) in your account. Yes it may keep being persisted somewhere else due to the nature of email but hey, it very much depends on your threat model, you don't control what the sender decides to send anyway, and you can do a best effort for it not to become a liability on you.

Sometimes mail bounces. I liked to delete those messages off the thread.

I find that using Gmail with mailing more than X people is impossible because the replies all get mushed together. I now change the subject line for individual replies so I don't get lost.