Vote to recommend a smaller default file type in LR/Photoshop Workflow, TIFF is 10x size of RAW!

[Schuster_Photography]

Would users benefit by a more efficient default file type in a Lightroom/Photoshop workflow?

(I'm going to mention Lightroom and Photoshop together as they are intended to be used in a single workflow)

Example of current file sizes:

I merged 3 50MP images from a SONY alpha 1 into a DNG file and it is only 22.1 MB. When I enhance an image in Photoshop Lightroom it goes up to 66MB, but then I use 3 of them to create an HDR it goes back DOWN to 22 MB. This tells me that Adobe isn't taking advantage of the DNGs correctly. The HDR should have more image data than the non-HDR orriginals. Worse yet, when I open the image in Photoshop and save it as the default format, it saves a TIFF that is 675+MB.  And yes, that is flattened with no extra channels.

Isn't there a way to make an efficient way to save files in our workflow? 

I do a lot of compositing. If I load 10 22MB images + some layer masks, couldn't you have that save EVERYTHING including the orriginal raws and layer masks for 400MB? Or if you convert the layer masks to vectors, even less? (22x10=220MB+layer masks).

My point of the above is that if 10 RAW images are 1/3 the size of a TIFF, there must be a better way to be efficient in our workflow. This would help with save time and reduce storage and backup space significantly.

[Lumigraphics]

Use the format that is appropriate for your images. TIFF/PSD are lossless and support all of Photoshop's features. DNG, JPEG, PNG (as an example) do not have layers, smart objects, arbitrary channel/mode support (LAB color, spot colors), vector objects, and a lot of other stuff.

[D Fosse]

A raw file is one single channel at 14 bit depth.

A rendered RGB file (PSD/TIFF) is three channels at 16 bit depth.

That alone almost quadruples the file size. Layers, alpha channels, smart objects etc add to that.

A PSD or TIFF is not "big" - it's the true native size of the data. Anything smaller than that is compression. Compression always comes at a price, whether lossy or not; such as long open/save times.