system
A chat on subreddit /r/me_irl
human
There is different kinds of isolation, in vsauces case he did not only have no books or other things he also didn't have time to keep track of, no interaction, food was already in his room so he was completely shut off, and the whole room didnt change light always on etc.. Yes these conditions might be different for 100 days but its still fked
gpt
Black Mirror feature this scenario a lot as a form of torture.