Dev manager: Php 8 is around the corner and i'd like to move the project to it
Dev: this would be a huge change I don't think you understand what you're asking...
Manager: Yes I understand, we'll plan 2-3weeks for the migration
Dev: the app is under symfony2.4, what you're asking is completly off the mark
Manager: look we'll plan it and we'll see don't be pessimist
Dev: ok whatever

I left the company, good luck to my fellow dev