This may be something useful, but you already have multiple ways to recreate an old effect. First of all, and it is the preferred way, save your layer/style setup as a new style and it will be always there to be applied to a new image. If you forgot to do that, then there is the User/History folder in the style browser, you can also reapply these styles to a new image. The history is of limited length (I think it is something like 50 styles), so sooner or later you should think about saving the styles that you create. Compared to your proposed PSD approach it has the obvious advantage of being able to apply the custom style with a single click instead of painfully reapplying all the filters in all the layers that you see in the PSD file.