Hosting someone involves some money for the food and drinks to be consumed, sure.
But hosting also requires the hosts to feel up to the task of hosting by feeling that their home is adequate for hosting.
Having a home that's adequate for hosting involves money. And these days, lots of it.
In 2025 in the USA, the average age of a first-time home buyer is 40 years old. [0]
The average 27 year old who might have bought a home in the 1970s [1] and hosted people there is now probably renting until they're 40 years old.
Not that you can't host when you're renting, but there's more potential issues that aren't there when you own a place, including:
* a higher chance of having roommates, which increases the logistics of planning, and also potentially intruding on someone else's hope to have a quiet night in * probably less space to host
So I think it seems reasonable to include the housing affordability crisis as a contributor to this, too.
0. https://www.realtor.com/news/trends/first-time-homebuyer-med... 1. https://www.linkedin.com/posts/azizsunderji_the-median-first...