[imchillyb]

I would argue that their non-standard implementation will make transitioning away from their service impossibly difficult.

The fact they don't support the widely supported IMAP means no easy way to move away.

This is vendor lock-in to their walled-garden. This approach should be killed, dead, before it ever makes it to the end user.

[bronson]

Transitioning away sounds easy: https://hey.com/faqs/#if-i-don-t-like-hey-can-i-export-my-em...

[wolco]

Lifetime forwarding if someone has a paid account? This will change in time. I wouldn't rely on it.