As an embedded engineer in a new position I always volunteer to take up an old crusty legacy product that nobody else wants to touch. It's a quick education into how the company approaches projects and all the ghosts they had to fight along the way. All the business logic is there, and sometimes it's even documented.
And once you have a semblance of knowledge about how the thing works and how to make fixes, you've built a small moat around your career there.
And once you have a semblance of knowledge about how the thing works and how to make fixes, you've built a small moat around your career there.