I’m amused by this notion that “it may feel like loneliness but it’s actually the richness of our new modes of communication you are feeling! Just get used to it!”
As for human interaction, the "right" amount is different for everyone.
This is true of most things.
the tech today allows to for example easily and frequently Skype with your family, like parents, sibling, nephews residing on the other continent. A humongous improvement compare to previous modes of expensive international phone, especially when many of those participants didn't have a phone back then. What is inhuman here?
It also allowed for communication like we have here on HN. Before, it would be limited to just watercooler chat with colleagues at work with very limited exposure and exploration of genuine opposite/conflicting opinions, whereis we can have a bleeding-trolling-edge blast online.
Isn't the feeling the whole point?
It's a bit strange to claim that, even though some people might feel lonely, they aren't /actually/. Lonely is a word that refers to an emotion -- not a word that refers to the circumstances that tend to bring about that emotion.
I'll grant you that if we had a perfect account of what those circumstances were, the two might be identical (for a physicalist, anyway). But that some people "may feel lonely" even now is a proof by counterexample that your account is not it.
It's absolutely possible to be alone and not feel lonely, possibly because one is an introvert or because they gain social fulfilment from online interaction.
On the other hand it's also absolutely possible to be surrounded with people, and even have rich social interaction with them, and still feel lonely. This could be simply due to interacting with the wrong people, but can also be symptomatic of mental health issues such as depressive or anxiety disorders.
Communication and interaction in social relationships is not just about information exchange. Non-verbal interaction (touch, gestures, physical closeness) are just as essential, if not more essential than verbal/text interaction for the majority of people.
loneliness? The amount and richness of communication like the number of participants, number of parallel communications, number of the topics and the range of opinions, etc. is most probably much higher when using smartphones then when it is subject to the limitations of physical presence. Our species brain development is basically history of social communication, and the smartphones transcending those limits of physical presence is the next step for the brain development of our species. Granted the adjustment period may have its quirks, like absence of non-verbal parts of communication - face emotions, gestures, etc. - that our brain evolved to expect and not receives anymore and thus doesn't get the associated dopamine - may feel like loneliness.