I say that I learned the hard way because I focused on being that high-impact developer. At my first job, I rewrote the company's core software to make it (really) an order of magnitude faster, providing the basis for the company's sustainability for the next decade. My salary skyrocketed. My title did not. I was forever stuck in a limbo of being just a "developer" while being paid as much as an executive but being excluded from every executive meeting and not even being involved in hiring for the team that would maintain the software I wrote on which the entire company depended. I was still stuck in a cubicle while the managers were sure to get very nice, spacious offices with ludicrous window views.