One thing no one else is mentioned is that what is useful or relevant to the business is very ill defined. All future companies for the entirety of your career

One thing no one else is mentioned is that what is useful or relevant to the business is very ill defined. All future companies for the entirety of your career will take on some unknown risk related to what your previous employers considers relevant. Companies hate ill defined risk. I run a consulting company and would never hire anyone who had ever signed a contract like this. It's too risky, if you did work for a client and some company I'd never heard of could possibly own that IP that could be company ending for me. If a client even just found out I hired someone who had signed a contract like that it could end a client relationship. Do not sign this. This could be career crippling.