I think its lame that people need to purchase and consume a substance just to enjoy things at normal levels. I mean, the first few times are really something amazing, but then your body just adapts and smooths out. When being high becomes a routine, and your body responds by accepting it as a routine of your normal brain function. When you stop abruptly or your smoking becomes significantly less frequent, your brain will delay the transmission of hormones that effect thought and mood because it has to adapt to the sudden absence of pot in your system. For example: most of my friends become short tempered and frustrated easily when they are skiing sober because they are used to skiing high all the time.
As for the OP, I don't think smoking weed is on the decline, anywhere...
It's cool in moderation.