I think design and culture go hand-in-hand and part of the appeal of mid-century modern lies with the zeitgeist of the decades in which it was produced. In the boom after WWII there was optimism abound about the future, economic prosperity, and a new middle-class arose. It was a time for exploration, innovation, and growth.
Designs reflected this in both ideology and manufacturing; better ways were sought to cater to the middle-class through mass production. This resulted in a new design ethos with focus on both function and form, modernising and simplifying interiors, as well as life for those living in it.
I think part of the popular revival of mid-century modern lies with that; its simplifying function as well as ‘form ethos’ fitting present-day living as much as it did back then, whilst it also connects us to the nostalgia of ‘better times’ gone. And, of course, the now increasing awareness of the need for sustainability also drives the interest in circular design looping back to that nostalgia.