As a JavaScript developer your career is a not dead but becomes a dead end at 40. At that point you must make a solid decision: * Stop growing as a developer a

As a JavaScript developer your career is a not dead but becomes a dead end at 40. At that point you must make a solid decision: * Stop growing as a developer and do the same things forever (dead end) * Enter management * Go do something completely different. There are plenty of technical challenges in that technology space to continue growing and producing amazing new things, but that exciting life is more commonly found as a hobby than employment. This is also a technology space with an exceedingly low barrier of entry and poor formal training, and so most related employment is directed to beginner tools to minimize disruption from employee turnover. After 40 as JavaScript developer your ability to command increased compensation by switching employers evaporates and your increasing experience is of diminishing value.