I’m really happy you have brought the conversation around to the rise of the adjunct, academic autonomy, and (especially) the lack of systematic support for experimentation. While time is certainly the most pressing issue that often prevents experimentation, there are also other factors that inhibit experimentation. Often systematic reviews (like faculty teaching evaluations), student satisfaction surveys prevent people from experimenting for fear of negative appraisals. In my experience, students don’t always react well to their faculty experimenting.
People need to feel that they have the ability to experiment and, crucially, the support and knowledge that occasionally their experiments might fail, but at the end of the day they will still have support from their institution.