I've actually found the opposite. Even when I was consistently evaluated to have above-average technical skills (for the company I work at), what kept my career

I've actually found the opposite. Even when I was consistently evaluated to have above-average technical skills (for the company I work at), what kept my career growth from advancing was a lack of personal skills. What's more, ever since I started improving those my personal life started seeing a big improvement as well. I recognise that for most, being at least moderately skilled at people comes as a given. For those of us where this is not the case it really helps to consciously work at those limitations.