Depressingly i think sharing computers at least in the western world has become a thing of the past. At the very least, sharing your main form of computing.
?? not all households have money to buy pc for everyone. for phones maybe (also less common outside of rich countries), but definitely not true for pc platform, for most of the world actually.. there a lot of pcs for the family still.
Right, in the sense of "the network is the computer".
Tangent: one of the most talented engineers I ever met gave an amazing (tho sadly company-private, unrecorded) talk about how the OS was his IDE. Kind of analogous... anyway, I like this type of re-framing or meta-level-shifting.