Next.js API DX is horrible compared to actual API frameworks like fastify. :/

I wish I could love Next’s API routes as much as the rest of the framework.

You're right, thanks for pointing this out. I'm the author; I updated the graphic to split based on the framework's purpose, "pure backend" vs. "focus on rendering". I hope this is clearer now.

Being able to return JSON makes you "full stack" the same having wings makes a fly an airplane.

Yeah I think they should be switched