This reminds me of when I left my first job after college. I worked in a network operations center that was growing quickly and very understaffed, because our company didn't pay well and the job market was exploding. On the plus side, the opportunities for technical development had been very good.
One of my coworkers and I lived in an apartment together, and were approached by a former coworker about an opportunity. We both got very good job offers, and he asked me if I was going to take mine.
I said "if he was, I was, since I didn't want to get stuck doing both his work and mine." He said, "yeah, no way I'm staying if you're going."
We took the the offers, and felt a little bad for the folks we left behind.
Not bad enough to stay though.