I believe delusions are shaped by our environment. truman delusions would go by the wayside. Probably most simulation theories too. Aliens weren’t big 300 years ago.
How would your delusions be different if you were schizophrenic long ago?
my delusions would be the same (Persecutory delusions and delusions of reference) except the ones related to new technology such as radio, telephone, security cameras,tv and the internet because they weren’t invented yet.