Habitarian
A habitarian is like a dog with a bone. They don't let go. They don't think. They just do what they've always done, even if it's dumb as hell.
'We've always used this exact same software. Don't even think about changing it.'
Why do we still use the same password for everything? 'Because that's how it's always been.'
Why do we still sing the same stupid song at the office party every year? 'Because that's how it's always been.'