Photoshop was basically done at CS6 (which was less than 15 years ago), so why not? I know the copy I'm keeping around to avoid Adobe rent-seeking is eventually goong to stop working on new OS versions.

We discuss emulators all the time here, so there would be less scrutiny if they just say that they are an aspiring CS6 emulator

Emulator means something pretty specific, it’s a ground-up piece of software with similar functionality. Not a PS emulator.