The wise advice, that my own father gave me yesterday, unsolicited, as I mentioned leaving civil engineering for a different field, was not to do it. I've inves

The wise advice, that my own father gave me yesterday, unsolicited, as I mentioned leaving civil engineering for a different field, was not to do it. I've invested so much, he remarked. It's secure. But the wise advice is not so wise: those years already invested are sunk costs. Ignore them. Compare the potential job satisfaction of switching with the possibility of falling behind your peers a year in programming.