Fuck me you're easy to please. I want everything, I want it all powerful, and I want it the size of a tablet?
Your big problem is you think professional laptops include a use case which they simply don't do. 13" "professional" laptop? Hell no. You'll alienate more users with than then not.
This is a reasonable professional laptop, and what I've been using for coding and data analysis for the last few years. Tons of ports, upgradable SSD/RAM, and easy to constantly lug around at 4.5 lbs. I don't need a huge monitor in the field and just because someone doesn't want to drag one around doesn't mean that they're not doing real work on the laptop.
If Apple refreshed this system, I'd stay with them. That model is also the last system that is easily upgradable, too.