No matter what the reason may be, it still stands that there is no better graphic option to justify an upgrade for professionals like us. 10 percent increase of graphics performance is very poor to justify upgrade to Surface Pro 5 from 4 even.
The extra power is most useful for architects and designers looking for a portable solution to take during meetings, jobsites, presentations, I was ok with it not having the power to run Lumion or eGPU requirements, but this takes the cake! Utter disappointment and a step back. It should AT LEAST have Iris Pro level or higher graphics to run Sketchup, Autocad, etc well. How can I upgrade now??? I simply can't. Good thing my Surface Pro 4 is doing well for the stuff I'm working on. Till then, will stick to this as my tablet/laptop.
PS I keep a more powerful slim laptop for portable rendering. Microsoft should have improved Microsoft Store and strengthened Windows tablet mode. Poor moved MS! Push those weaknesses like Samsung and Huawei have been so aggressive. They may slip every now and then but you can see how aggressive they are. MS has been too laid back with Surface development. Just look at the USB-C connector and lightning external graphics acceleration. POOR! I would have given up my powerful PC if only there was an option to hook this up to a graphics accelerator. I want less clutter in my life. I already gave up on the iPAD and TAB S4. People still need a full running PC system with max compatibility. But it is essential to be able to boost it and hook it up when ur at home base. You should also be able to take it with you during travels that you have to bring hardcore work. For example people who do wedding photography, etc.
SUMMARY: Surface Pro 5 and 6 are BOTH big fumbles in terms of upgrading a great system / format. You wasted it MS! Bigger strides I have seen more in mobile phones. This is why Windows Phone failed hard. Please don't make the same mistake. I don't want to see another great idea / product go to waste!