Karadjgne :
Why a slow SSD? Because realistically a gaming rig will see no bonus to an NVMe, so why pay extra for nothing. A plain sata3/m.2 is far faster than a cpus gaming needs. Production apps or other programs using large file transfers would benefit a lot from the more expensive NVMe, but when that builder crammed every bit of gpu performance possible in that build, the priority was gaming, not production, so the NVMe really isn't warranted.
Why only 16gb of RAM at that point? 32gb should be automatic at that point. Not to mention these are "Best PC Builds" not "Best PC gaming Builds" so it should be the highest performance possible across all uses. So, yeah this build is handicapped RAM wise and by a slow SATA SSD.
Also, where is that 120mm radiator going? Product description is as such "Liquid cooling support: 240mm, 280mm, 360mm Radiators (Front and Top)" So to utilize the 120mm you'll have to sacrifice another fan to mount it if it'll even mount. So either top or front will only be 2 120mm fans rather than 3.