I never use Photoshop, but sometimes I work with graphic designers who like preparing everything as one huge PSD with lots of layer groups, and it feels like an

I never use Photoshop, but sometimes I work with graphic designers who like preparing everything as one huge PSD with lots of layer groups, and it feels like an absurd waste of energy to keep subscribing to Photoshop just to export all layers as PNG, since that is all I ever use it for. Photoshop itself can barely do this, HOURS on moderately complex documents. Maybe this would be a good time to ask, does anyone know of a 100% compatible way to do PSD -> any open layered format, without Photoshop? Maybe this is a business opportunity, to run a web service whose sole purpose is to open PSD files in photoshop with a custom export script, and then export the layers.