I am running a Dell Precision 7740. Normal version with the big battery has 4x M.2 slots. Mine has the small battery and 3x M.2 + 1x SATA which I plan on using for up and coming product.
I use one 8TB for a boot drive, two others for a RAID 0, so right now 24TB of flash.
The version of the 7740 I picked up has only Intel GPU, I use a RAZOR CORE X Chroma for eGPU needs at the desk. Even with a small battery and no Quadro battery life is several hours longer than one with a Quadro.
Anyway it's a fun laptop
Still trying to figure out how to get two different screens, one on the 7740 and the other through the eGPU to 4K screen. Right now they both are the same image.