[RedCats]

Email's resilience is almost paradoxical — it's the least "designed" communication tool we use daily, yet the most durable. Slack added presence and speed. Notion added structure. And yet none of them replaced email's core role.

I think the reason is that email is fundamentally asynchronous and unbounded — you can send anything to anyone, with no shared platform, no mutual agreement required. That's not a bug, it's the entire point. Every "better" tool that replaced it added friction by requiring both sides to opt in.

Interestingly, even AI hasn't disrupted it — if anything, AI has made email more valuable by making it easier to write well and filter noise. The protocol survives because no single company owns the incentive to kill it.