Still seemed odd to me why a preview doesn't have such a basic continuous function, since other native options for other OSS aren't full blown editors either. I think this picture function has been around in other OS for over a decade now?
Especially with more people who use phones or tablets than desktop OS it seems like coming into MacOS and opening a file to look at a larger preview and being able to continuously look with no additional steps would be the behavior they'd expect.
This is the one thing that has confused me more than the default windows snap behavior or the scaling options for external monitors, since it is so basic I never expected to not be a thing in any OS released these days.