[Railsify]

If you sent a personal friend 2 twitter DMs, then 2 emails, and then 3 text messages and they don't reply, I don't think they are a friend. My inbox gets pounded as well but if a personal friend emails I skip all the other emails and reply to that one first.

[MiddleEndian]

Yeah my friends know how to reach me, doesn't matter how busy my work email is. I'd be really surprised if the CEO of Uber didn't have a way for his actual friends to reach him that was unrelated to his 100,000 new email work inbox.

[ryanbrunner]

Absolutely agreed. I think the parent article is decent advice for cold e-mails, but for personal interactions not responding is a good way to lose friends over time.