I am not sure it will ever work in your profession. I know you likely need certain formats, but have you ever tried some iPad alternatives for the software you mentioned?
I'm in the same boat as him. Even the best cases only get about 20% there:
- Photoshop: Affinity Photo is pretty good for this.
- In Design: Until Affinity releases Publisher for the iPad, there is no Indesign-style app that does what we need. They haven't even released the macOS app so this is a long road
- Sketchup: no suitable replacement. Format 360 does some of it, but not all of it, and if you need those formats you're out of luck
- CAD: As I mentioned in my post, AutoCad mobile isn't a production-quality app. It's just good for noting documents in the field.