I think the model they created will persist into post Covid, with the addition of physical connection.
I won't even touch on the idea/harm of replacing physical connections with purely online ones. A lot of my friends are people I have met via the internet, but our friendships have often been cemented by eventually meeting up in person. I suspect the same is true for most people who talk about their extensive online social graph.
I've been on reddit for ~12 years, for example, and after five or six years still hadn't really cultivated any kind of 'group' or relationship with anyone, so I just started rotating my accounts regularly because the social aspect of the platform is essentially of zero value. HN feels much more like a community, and some of the forums I frequent are even more so, despite being largely undiscoverable and frosty to newcomers.
We have more nerves devoted to touch than any other sense. We're a social primate species. We need to shoulders to cry on, hugs, handshakes, etc. We crave being in the same space with others, experiencing their physicality.
Even the smell of our loved ones is an important component of being connected to them. Most of us probably have deeply evocative memories of the smell of "grandmas's house" or an ex's shampoo. Scent is tied to our emotional memories more deeply than any other sense.
As a young person today, I feel totally disconnected from the people around me, even moreso because of the pandemic, and I actively try to spend less time "socially"/"digitally" etc. because they only increase feelings of loneliness. No technology besides basic telephony has done anything to help me stay more connected to my friends.