3D type features seem to be effortless in vector graphics apps like Illustrator according to the many posts that I've read here. If you don't have Illustrator, you might try Inkscape, a free alternative. Then bring your type layers into Ps. Or as u/MicahBurke suggested, check out Blender. I've often seen that recommended for 3D type at this sub. More on reddit.com

Are there any other ways besides copying and pasting text a zillion times? More on old.reddit.com

Personally? I think Photoshop tries to do too many things for too many uses. It has become overly complex bloatware. I don't think it hurts to simplify it a bit. Choose a few core functions, and focus on improving those. Spin off some of the other functionality to other products. More on reddit.com

this is a little tricky because it sounds like you're doing something where one file = multiple images. What kind of file is that? A layered PSD? A multi-page PDF? This is what I would want as my setup: Open any sample image. Record an action of just the mockup steps. Don't include opening any files in the action, and don't include saving or closing in the action. Put every image in one folder, and back the folder up. If necessary, convert their format (like if they're jpegs and you're going to need transparency later, convert them first to png or PSD's). If you have multiple images in one file, like a multipage PDF, maybe export them as separate image files? File - automate - batch - choose the folder. It will do everything in the folder and stop when there's nothing left in the folder to do. Choose "Save and close" as the destination (which is why we made the backup first). If all of the above can't work because you have a file with multiple images, you can still probably do this with photoshop scripting. Scripting can choose specific layers and even detect layers of a certain type (like text) before running actions on those layers. More on reddit.com