Is it possible? Maybe if you say a specific language, yes, but even then, there are new versions or iterations where whole new features are introduced. Mastery

Is it possible? Maybe if you say a specific language, yes, but even then, there are new versions or iterations where whole new features are introduced. Mastery in software engineering needs to be defined very specifically. An example, I used to build Flash microsites, campaigns and games for an ad agency. I had a very good grasp of the tech, built projects for large clients etc. If you looked at me at that point in time you could say I had mastery, but now Flash is gone, and I didn’t switch over to React and other web based tech soon enough so my “skill” is lesser than someone who purely started in that domain.