What’s a fundamental non-currency infrastructure affordance of blockchains that can’t be delivered with web2 or older stacks easily? 

A near-example is NFTs bought on one site showing up on another, which you can’t do in web2 (closest is walled garden/game badges). 

Things like this but more infrastructurey in flavor, and neither finance related, nor fun and games. Maybe like DeFi for nonFi things?

Delver at contraptions.venkateshrao.com, running summerofprotocols.com, host of /gloom ☀️

ens being global namespace is sorta this

also being able to track your in-flight txs no matter where you (e.g. technically any bridge site can show you a pending bridge tx)

also stuff like streaming interest anywhere you want from anything you want (e.g. paying creators with eth yield, buying tokens with sdai yield)