The 128GB Surface Pro 4 models use perhaps the worst NVMe based SSD in production (link is closest model on Samsung's site, but specs line up with benchmarks) : r/Surface
Amazon.com: Sintech PCIe nVME,M.2(NGFF) SSD to PCI-e 3.0 X4 Adapter Card with Heatsink,Compatible for Samsung 960 970 EVO : Electronics