Interesting discussion. Every tech company I know of has a career path for engineers who don't want to get into management (with roles like staff, senior staff, principal, distinguished engineer, technical fellow etc.) and so you can keep progressing basically indefinitely as an IC. I have never seen this done on the product side, however. After a point every product manager has to start to focus on people management to get ahead, which undoubtedly has a negative effect on the product itself. I wonder if more companies will start following this approach for non-technical roles as well.