This makes complete sense in an environment where people transition from noob to senior engineer within the same company.
It makes less sense in an era when tenure is better measured in months than years.
It makes even less sense in an era of LLMs.
One area where it might be relevant is the military. People are more likely to stay for longer (unvalidated assumption) and the same personnel jacket follows them if they are transferred.
It might also be thought of as a guide as to when to jump ship. If you have managed to get yourself categorized as a C, then leave. Start fresh somewhere else, take the learning with you, and discover if you have what it takes to make it as an A or B.
It makes less sense in an era when tenure is better measured in months than years.
It makes even less sense in an era of LLMs.
One area where it might be relevant is the military. People are more likely to stay for longer (unvalidated assumption) and the same personnel jacket follows them if they are transferred.
It might also be thought of as a guide as to when to jump ship. If you have managed to get yourself categorized as a C, then leave. Start fresh somewhere else, take the learning with you, and discover if you have what it takes to make it as an A or B.