In Ferris Bueller’s Day Off, Matthew Broderick famously winks straight into the camera: “Life moves pretty fast.”

Life does move fast, but AI might move even faster. I talk to VCs all day, and it recently occurred to me: Though venture capital’s meant to be the long game, AI is moving so quickly that it’s making deals that looked good in 2024, obsolete by 2026.

“No doubt that AI is changing really fast, and it’s changing the half-life of a thesis,” said Eric Archer, cofounder of VC firm Monashees.

So, I’ve been wondering: If you’re an investor right now, what does it even mean to do a responsible portfolio review? How many companies that looked great in 2023 or 2024 are now just toast?

“The two categories that have some amount of insulation are regulated license businesses and businesses with proprietary data that’s difficult to access,” said Kamran Ansari, founder and managing partner at Kapital Ventures, and venture partner at Infinity VC. “Absent those two things, everything else feels exposed.”