[hazyc]

Superhuman seems like an odd example because for an 8+ yr old startup it doesn't seem at all obvious that they have PMF yet.

[dcow]

Everyone I know tried Superhuman, thought the experience was cool, and then went back to their old inboxes because it turns out that shaving milliseconds off email workflows doesn't actually save that much time or materially change the experience. Maybe it’s game changing for EA type jobs where the day is primarily spent managing and navigating an inbox, but for the rest of us, that’s just not the case. Superhuman feels like a feature not a product.

[2arrs2ells]

Making an app you spend significant time in every day more useful & powerful can be a path to PMF (see Slack vs Hipchat, for example)

I’d argue Superhuman does have PMF - just in a smaller market of email power users.

[gnicholas]

I'm seeing tons of ads on FB and wondering what the strategy is. If you have a waitlist of 400k prospective users, why advertise on FB?