To clarify my original post: I do pick up new technologies when they come along. For example I'm using TypeScript in the two projects I'm working on, and I didn

To clarify my original post: I do pick up new technologies when they come along. For example I'm using TypeScript in the two projects I'm working on, and I didn't even know it existed one year ago. My point about sticking with something for the long term to build up experience was more a long the lines of "If you think you can be both a Java developer AND a .NET developer" that is very wrong thinking. Pick one. Focus on it. It's just the "jack of all trades and master of none" effect I was getting at. Certain technologies are designed to compete with each other and using them both will only cut in half your "experience" level on each one. I appreciated (and agreed with) all the commenters saying how wrong it is to just lock onto something and try to make a career out of it: however the following are the winners: Java,JavaScript,TypeScript,HTML+CSS, and anyone who has those skills as primary on their resume has a bright future. If you don't, you're taking a risk that your "flavor of the week" will be obsoleted. 10 years from now those core technologies will ALL be in demand.