42 percent of the total US population is obese. In fact, with the explosion of cheap, mono-crop, GMO foodstuffs, obesity is all the rage around the world: Mexico, UK, India(!), etc. I write all this to say that growth trends are not indicative of progression to a collective good. This is very much the case about living alone--a subject I know better, especially as it pertains to housing, than all but a handful of people like Eric Klingenberg. Living alone is largely a function of disintegrating family structures and communities as well as the abundance of digital media that conditions its users to escaped into their own worlds. I'm actually a big fan of housing specifically for singles, but that housing can still be social (e.g. dorms, residential hotels, cohousing, etc).
Like I mentioned, social connectivity and happiness are highly correlated, so even though folks feel COMFORTABLE being alone--ordering Uber Eats, binging on Netflix, not dealing with messy interpersonal situations--it is not GOOD for them.
Some stuff I've written directly or indirectly about the topic:
https://www.dwell.com/article/an-exhibit-explores-ways-to-combat-the-u.s.-housing-crisis-33abcddf
https://medium.com/thechangeorder/data-driven-architecture-78992b22b3f1
