Depends on the industry and the tech you choose. Wordpress started in 2003 and if you chose it back then, it's still kickin'. I just checked the website of th

Depends on the industry and the tech you choose. Wordpress started in 2003 and if you chose it back then, it's still kickin'. I just checked the website of the first job I had out of college, in 2004, for a niche tech company in the auto industry. The java-based central auth system I put in is still in use (I can tell by view-source). If it's lasted this long, another 10 years shouldn't be too hard.