Yes, I know the experience. I suspect that when you scoop and shake out that last bowl from a tin or jar, you pay more attention. You don't immediately jump on the computer, into a book, or turn on the music, but puff slower and taste better. Sometimes I think that concentration is underutilized. We're so used to multiple activities and inputs to our brains, we tend to miss all or most of many of the experiences. Also, as with chasing scarce tobacco, you don't know what you've got until it's gone, or not available.