I think kitbashes is a good idea for filling empty space with details. I created kitbash based on submarine interior. All geo is subd.
I am really happy to announce my kitbash. All geometry is subd.
I created kitbash based on submarine interior.
I have created an environment, it's kinda showcase how you can use this kitbash.
https://www.artstation.com/marketplace/p/J5Gg/industrial-hard-surface-kitbash-subd