It's anecdotal and I have no idea how widespread this is or why it happens, at least to people for whom self-isolation didn't work in the past. I can only imagine that the isolation may relieve some of the social pressure without leaving you with the feeling that you have to go to extraordinary measures to achieve it, it doesn't feel so self inflicted like self-isolation does under regular conditions. Now it's an external cause and applies to everybody.
(I'm not trying to push this too far: I assume it mostly applies to people who have enough control over their lives to take the necessary precautions, and who are fortunate enough that the threat to them and their loved ones remains a possibility rather than a tragic reality. And I know that the exact opposite can happen: sometimes external threats just multiply the pre-existing anxiety and make it even harder to cope.)
Compared to say living in 1000 AD. Family units are smaller, life is more fast paced and it’s way more complicated with all the credit cards, the often difficult legal system, and ever present “connection” to one another through messaging and social media. During this pandemic I’ve deleted all my social media accounts and even though I’m less “connected” now, I feel much better than before and the world even feels more real to me.
My hope for cultural change post pandemic is that the shift towards remote work will persist after it's over. I love being an engineer but I can't stand working in an open office or commuting 2 1/2 hours a day.