> Headline: Using next/image is not the same as having fast images. The component lazy-loads every image it renders unless you pass priority, and a wrong sizes prop makes a 400-pixel-wide card download the 3840-pixel candidate on a high-DPR screen. ...

> Headline: An in-memory rate limiter is wrong on serverless because every function instance keeps its own counter, so a limit of 10 requests per minute becomes 10 requests per minute per instance. The second trap is that every Next.js Server Action ...