Earlier quoted context omitted.
Imagine being the engineer who has to keep maintaining the IE codebase for the next 8 years. [shudders]
While I wouldn't want to do it, if you've been working on that codebase for years and you're no longer young and fired up about always going for the latest things, it could be a good way to sunset your career. A guaranteed position using technology you understand rather than being thrown out into the job market, struggling to get up to date on the latest programming fads so you can compete with people half your age,…
It's not just about doing something new; a bad codebase that I don't have the opportunity to genuinely improve is probably the most miserable type of project I can possibly think of