[dchftcs]

> I have to learn their processes/tools/etc from reading the docs. > So I'm probably coming in at like 20% better than junior.

There are firms that take that to heart, and there is indeed a lot of truth in it. A large amount of skills and knowledge just aren't transferable when switching jobs. But I think it's not hard to create more than 20% of the value. And even if it really is 20% of the value, the profit generated from the work might actually be more than the salary gap anyway, and the 1-year growth curve might be faster for a senior than a junior.