> as just keeping the blade sharp Replacing weapons and keeping blades sharp is not the same thing. Now, the metaphor kind of breaks down because new weapons a

> as just keeping the blade sharp Replacing weapons and keeping blades sharp is not the same thing. Now, the metaphor kind of breaks down because new weapons are sharp, but abilities with a new technology are typically not, i.e. you use new tech as somewhat of a blunt instrument until you learn the finer points of it - and until it develops and matures enough itself. So, if you want to use "sharp blades" - don't switch technologies, but rather keep with the updates to those you already know.