All our urban planning, architecture etc is modeled around individual isolation. Unless you want to go to a commercially viable social activity like a bar or sports game of course.
We are now living in a society built around individualism and survival of the fittest. There are very few remaining third places and the people are too accustomed to this way of living in order to participate in them. As a consequence, it's more common than ever for people to have no real friends, especially working adults.
Fun fact: one million dollars is not enough to retire in many parts of the United States.
The classic retirement rule of thumb is the 4% rule: you should be able to spend 4% of your retirement savings per year. The idea is that safe investments can mostly make up for what you spend, and whatever they don't make up shouldn't be a problem in your lifetime. If you plan to retire early, maybe shoot for something a bit more conservative, like 3%.
So by the 4% rule, $1MM in retirement savings is like living on $40k per year. Which is moderately comfortable in some parts of the US and poverty in others.