progressive enhancement is not about offering all functionality; progressive enhancement is about making sure that your core functionality is available to everyone. Everything after that is, well, an enhancement (the clue is in the name).
Jeremy Keith

It is more often than not that I find myself in discussions about this exact point: I want our websites, their core tasks, to function, and if this is cared for, then we can talk about the fun stuff.
To many people this, in our new and modern browser times, seems to be a waste of time, why care for systems or users ...