> Half life of knowledge in our profession is more or less a year and a half.
Only if you define your profession as knowing the latest front-end frameworks. In terms of concrete technical knowledge that half-life lengthens as you go down the stack. But beyond knowledge of existing tools and frameworks, there is also the understanding of systems and how they interact with the real world. This is what you need to understand to really give yourself a life-long career. It can still be hard tech (distributed systems, scalability, etc), or it can be a little softer (UX, maintainability, collaboration, etc), but these skills will give you the ability to dwarf the actual business impact of the 25 year-old who has maximized knowledge of the latest tools.
Only if you define your profession as knowing the latest front-end frameworks. In terms of concrete technical knowledge that half-life lengthens as you go down the stack. But beyond knowledge of existing tools and frameworks, there is also the understanding of systems and how they interact with the real world. This is what you need to understand to really give yourself a life-long career. It can still be hard tech (distributed systems, scalability, etc), or it can be a little softer (UX, maintainability, collaboration, etc), but these skills will give you the ability to dwarf the actual business impact of the 25 year-old who has maximized knowledge of the latest tools.