Of course, Dietmar deseves respect, and, in what regards to contributing, he did so more than most already.
That said, his results with Kai's NVMe.sys were quite different than mine, and I suspect that's due to the fact he used a single NVMe disk stand-alone (and hence caused XP not to load scsiport.sys during start-up), while my results were due to my not being interested in actually booting from NVMe, but just using it on a system booted from any other device, and so doing it in a machine with other SATA HDDs and SSDs (which lead XP to load scsiport.sys, and this *seems* to be the reason why storport.sys fails to load afterwards). This is a question that remains to be eventully elucidated.
Another thing is the "modded acpi.sys" which is referred to here and there, most often at Fernando's, but not released in any form nor, AFAIK, described suficiently for others to reproduce the mod. By now it's pretty clear that either modding the actual board BIOS or (much better) replacing the default acpi.sys by a modded one is of paramount importance to get useful results from Sunrise Point and later chipsets.
And, BTW, for those wondering, no: there is *NO* intel USB3.x drivers for XP up to the present. But, for non-intel USB3.0 controllers, drivers do exist and work well (Renesas/NEC and ASMedia, at least).
But all in due time. I, for one, right now, am just curious, nothing more, of course!