I suggested Sofirn to look for a Px flux bin and a DC or DD chromaticity bin of SST40, being around 4.800K. This one seems to please most of us, being quite neutralwhite and not greenish, see Wildtrail's BLF D80v2.

If I recall correctly from the SC31 Pro thread, Sofirn is definitely interested in SST40 4.000K but so far it is difficult for them to source.

Type C-C cable compatibility should be easy to achieve. Basically, it's just two additional resistors in the USB-C port to make it work. But even with USB-C (type C-C) it will still be using 5V 2A (10W) or maybe 12V 1.5A (18W) as we have seen it before in Sofirn's SP36S, see my picture below for reference. A powerbank mode ("reverse charging") would be great but my guess is that SP36 Pro will not come with that feature as it requires significant driver changes. But maybe we will be surprised... ;-) Since Wurkkos has introduced reverse charging with their new HD20 model, I am confident that Sofirn will eventually offer this functionality, too. I hope that future driver revisions will offer the PowerDelivery protocol with 36W (12V 3A) for faster recharging.