In this issue:

• The Superhuman Formula

• Identity

• Extending Logistics

• Strategy Decay

• Instacart and Ads

• Burning Abstractions

Programming note: The Diff will be off Friday through Monday, back Tuesday

The Superhuman Formula

Superhuman just raised $75m for its email client, in a round that has been derided as funding for a "7-year old Gmail skin" with a slow pace of p…