Depends on your working environment. At my current position, if I code up a prototype during work hours, I'm subverting our EPMO, since it's not an approved project. I've had great success doing various prototypes like this, but I am not waiting for permission to do them.

Bringing those prototypes to production is another matter. In any organization, there are processes that need to be followed to onboard a new application, platform, pattern, etc. If those aren't followed, the implementation won't be nearly as effective—especially long-term.