> From a project management perspective

This assumes you know what the project(s) is/are. Also the people working on it aren't robots. Maybe certain things take time to figure out and meanwhile you can do something else? It's also not just 1 person on the task.

> if you can get Next.js customers onboard you'll grow much more than supporting S3

Towards what? That doesn't make $$$. This is VC-backed. The goal isn't to provide Bun for free and gain all the users in the world.