I was surprised recently to hear my parents (in mid/late-60s) -- both uber-dubs who always put a positive spin on everything WT-related-- lament (unprovoked) that their congregation, which used to be full of young people, families, and tons of kids, is now just a collection of older people battling health issues, whose children have all moved away.
Their congregation looks good on paper-- a disproportionately high % of publishers who are pioneers and elders-- however it's the same people that have been pioneers and elders for 30+ years. Same people, same apathetic territory, etc. The only thing that seems to have changed in the last 30 years is steady decrease in "young" (<50 y.o.) and in the increase in health issues for remaining members.