The material commonly mentions "isolates" or V8 taking 5ms to cold start, which seems clearly aimed at Workers. But the same point applies when comparing again

The material commonly mentions "isolates" or V8 taking 5ms to cold start, which seems clearly aimed at Workers. But the same point applies when comparing against Lambda. It's not a cold start if the app code is already resident in memory in advance. Workers and Lambda also proactively load some apps in advance, and we don't call it a "cold start" in those cases.