Just a suggestion, but what about going with one of those matte-ish screen protector overlays? A couple of faculty have them on really reflective touch screen laptops at the University I work at and they really help a lot..

No problem! We’re all the same human beings & should help each other out where we can.
The learning curve for the DISM procedure, slipstreaming drivers etc is really not that steep. I’m little more than a mildly domesticated chimpanzee (or perhaps more of a Muppet?) and even was able to figure it out within the 30 or so minutes it would take to write a bog-standard MS official ISO to USB.
Granted it is a bit more involved than the days of yore, where using NLite to slipstream & customize WinXP CD images…but even so, easy enough.
A good skill to learn & remember for the future Win10 roadmap.
Cheers!

Les, I appreciate your work. I use OS X at home and Windows at work. I will say that that the OS X 8GB and Windows 16GB (Memory) are comparable. Otherwise, I am settling w/ Windows 8GB. If you are going to dispute this, I’ll label you a fanboy who has lost objectivity. I’m not a Windoze hater, just a knowelegeable user trying to get work done.

Thank you for including this. The concern I have with it is that it is so difficult, or at least seems to be, for the average guy just looking to do the upgrade.

2) Do it the ‘proper’ Microsoft way; create a somewhat custom Windows 10 (bootable) installation image.

3) Use Microsoft DISM / DISM GUI (<— for the fainthearted amongst you when it comes to CLI-geekery)

What you need to do here is build a custom-ish boot.wim & install.wim (or install.esd if you wish to save some space) that has the required drivers included within the installation image itself. It is the so-called 'slipstreaming' method of days long gone by, from the circa Windows 2000 / XP era. Vintage stuff 🙂

I nearly ran into the exact same issue when I swapped the SSD out for a faster/higher capacity unit in my XPS 13.

The Windows 10 installation image you are using to write to your USB stick, using the official Windows USB/DVD Download Tool, needs to include (at the bare minimum) the USB3 & Intel-NVMe/Intel-RST/Intel-RAID drivers integrated. Grab those drivers from Dell's product support site for the XPS 13 model you have.

Next, get familiar with Microsoft's Windows DISM: https://msdn.microsoft.com/en-us/windows/hardware/commercialize/manufacture/desktop/dism—deployment-image-servicing-and-management-technical-reference-for-windows
While at it, get familiar with the DISM GUI as well: https://dismgui.codeplex.com/

Once you've got the boot.wim & install.wim files (or install.esd for the jive turkeys who have a worrying fetish for file compression) with the integrated drivers on your Windows 10 install USB stick, your formerly missing RST/RAID will reappear….by means of the black arts & witchcraft. I've got the same XPS 13 93xx series ultra book, just that it is not the gold colored one… The method outlined up ^^^ there, worked like a charm on the first try. You can choose to integrate/slipstream *ALL* the drivers specific to your particular model XPS 13 in one go if you like as well.

Cheers!