It would be telling to compare how people in their 50s spent their income when they were in their twenties compared to 20 year olds today.

They partied way harder and generally got "seriously focused" on careers much later if stats are any indication. If you go even further back to the boomers it's a laughable comparison. But none of those prior generations ate avocado toast because they hadn't yet mastered transporting avocados long distances while maintaining ripeness if that's what you're asking.