I'm essentially a programmer with money in the bank, and I wouldn't sweat a lot (for the first couple of months, at least) if I got kicked off my job. And, even if I did lose it, there are plenty of places I could get a job. But still... I understand the anxiety a lot of people must feel.
But damn it's restrictive to have worked on one system, one environment, near all your life. I've touched damn near every program my company has to offer, but we got took over by another company and they're integrating things... we live in interesting times.