More like a cloud at this point. It's been heavily implied they sync up with the main brain every now and then so they have the means to do backups and the only time they didn't is when they had to deal with York's betrayal.I guess since they are all just separate personalities of Vegapunk, they all still exist in his brain jar
Great taste for your profile pic btw.I love chapters like these, between arcs. That atmosphere was great.