From my perspective, there's loads of this legacy/boring crap (lots of PHP&Rails). As a "old" coder, I love those legacy apps that folk can't/don't give to their internal team - it becomes consulting work for me :)
Amongst a group of people I talked about this with, we estimated that places that allowed resume farming saw between 6 and 9 months longer average employe retention times. For a place aiming at 3-4 year turnover that’s a substantial fraction of your goal.
And sometimes you get landed a fun legacy one where you have to rebuild some binary by de-compiling first (thanks for not stripping the binary previous long-gone dev) and then spend days re-factoring it to work with updated AT commands on the new hardware. And nobody's rushing you, cause you're like the only one doing it; and finding another person to even WANT to do this is $HARDWORK.
I'm still out here doing VB6/VBA, Perl as well.