My last job was I think maybe a somewhat less common story than I see here. I definitely did want more money and could see the raises begin to slow down as I reached the upper half of my pay band. What really had me looking though was that I was using dead-end proprietary tooling, with no team to work with, becoming the single point of failure on one of my department's main "products" I guess if you could call it that. It also still involved a lot of mind numbing work and dealing with red tape since it was a defense job.

It was about year 3 and I needed to leave or I'd get pigeonholed there forever, so I just took the first appealing job offer that I scored and bounced. Decent raise but the new environment has made my resume massively more appealing (using very in-demand tech, managed to get a fast title bump, I lead a small team now, etc).