1. The battery life does not improve when on Hybrid Graphics mode, and merely browsing the internet, or typing documents gives roughly five to six hours of battery life... with the 97 W hr battery. Oddly enough, even when running the laptop in discrete-only mode, the battery life does not worsen. This leads me to believe that Dell have a firmware issue, and the Nvidia GPU is idling and drawing power even in Optimus mode. Note that I have checked this out with several different tools and utilities. They all report that the Quadro is sleeping and not running, but I've done some power calculations here, and there is a clear 7 W discrepancy between power draw as reported by HWiNFO.
   
   Before anyone else says it: yes; I've checked the taskbar GPU Activity indicator—it is greyed out, i.e. no background programs are using the dGPU. Compare to the XPS 15 (or the Precision 5530), which achieve runtimes exceeding 10 hours on the 97 W hr battery, even though those machines were also tested with the 8750H and GTX 1050 Tis.
   
   

2. That image also shows periodic CPU spikes every few seconds or so. Nothing was done to the notebook while these readings were logged.

3. Related to the GPU, the backlight control is locked at the maximum upon first boot with the Nvidia GPU. Besides myself, there is at least one other user on the NotebookReview forum who has experienced this, and we've had to resort to odd workarounds to fix it.

4. Next, the touchpad polls at an extremely high rate, leading to CPU spikes every time a touch/swipe/scroll action is performed. This effect is so exacerbated that when the machine enters power-saving mode when the battery is low, there is a noticeably ~1 second latency between touches and display updates. Sometimes the cursor stutters, too.

5. This issue is limited to my personal machine, but the contactless smart card reader has stopped working after updating my notebook to Windows 10 1809. I receive this error in the Dell Contactless Smart Card application after trying to re-enrol my smart-card:
   
   

6. Finally, there is absolutely terrible display quality control on these notebooks. My first display began randomly blacking out, and then at one point the backlight simply stopped working. Several others on the NotebookReview forum have experienced poor quality control, like dust under the display, fingerprint smears, dead pixels, backlight bleed, etc. I am in half a mind to install an aftermarket display, namely the Chi Mei N156HHE-GA1.

We are paying multiple thousands for these notebooks, and we generally expect some measure of quality control. Points 1 to 5 are software/firmware issues that can be solved by pushing bug fixes and firmware updates.

I really hope Dell can get to the bottom of these issues.