I have not read anything about a scheduled date for the /pages router to be depreciated. When it happens, I imagine there will be a pretty substantial warning. It won't stop working on a semver minor upgrade, for example.

In the past Vercel has dropped stuff pretty fast though, so there is definitely some added degree of risk, especially if your app is not easily portable to the new router structure.

I remember they said it in the announcement stream back then, when they announced the app router

Here's a more recent update: https://nextjs.org/blog/next-13-4#is-the-pages-router-going-away

Thanks for the reference, it is good to know!