Starting a thread of work costs almost nothing now. Switching between them costs exactly what it always did, and that's the bill nobody put on a dashboard.
Autonomous agent loops don't remove you from the work, they relocate you — onto the spec you write up front and the big diff you review but never watched grow.
Privacy was never the only reason to run a model locally — resilience is. A fourth case for local AI, made concrete by 18 days of a frontier model going dark.
AI collapsed the cost of writing code and changed nothing about the cost of owning it. Velocity is a development-time number. The bill is a lifetime one.
AI gave me the throughput to cover a role I don't normally hold — but not the judgment that role is made of. A release, an incident, and a skill I'd outsourced.