In the time you've spent arguing about Vercel on here you could have actually tried it out and then you'd actually have your own opinion based on genuine experience.

I've used AWS Lambda professionally for years, Vercel is a totally different beast. I recently span-up a hobby project recently on Vercel rather than AWS Lambda (using Serverless Framework) to try out next.js and it took about 10 minutes to get it working whereas AWS Lambda would have taken a lot longer.