Sierra co-founder @btaylor says the era of web apps is over: "We made these databases, these systems of record in the 80s and 90s. And then as the web browser came out, we said, 'We're going to give you some forms and fields in the web browser to manipulate these systems of record.'" "Now we think, in the future, most people are just going to be talking to AI agents, and they're just going to be performing those actions on your behalf."