1. The transformation of family dinners reflects profound cultural shifts: Ms. Hartley contrasts the formality of meals in her youth (everyone properly dressed, following strict manners) with today's reality where many families eat fast food without defined mealtimes.
2. Dating norms have evolved significantly: The interviewee describes strict restrictions (no dating until 16, early curfews) and double standards between brothers and sisters, showing how social freedoms and gender roles have changed over time.
3. The way people address adults has become less formal: Ms. Hartley mentions that previously children had to call adults "sir" or "ma'am," while now using first names is common, reflecting a less hierarchical society.