>> But there are also a lot of people who thought that if they learned one environment they'd have a job forever Well that's how it worked out for me. I learne

>> But there are also a lot of people who thought that if they learned one environment they'd have a job forever Well that's how it worked out for me. I learned Java in the 90's and have used it at every job since for a quarter century. It's changed some, but it hasn't changed that much. It's not going anywhere. I learned other technologies when I had the chance but it hasn't really mattered, all that was wasted effort. I guess it matters more for front-end development, but over the years that has shifted into being done by a separate team most places I've worked. I don't touch front-end code where I work now.