NVMe/TCP is on the fast track for standardization
NVMe/TCP is on the fast track to become just as standard as NVMe/RoCE -- we (Lightbits Labs) are working hard to standardize it as part of NVMe.org in collaboration with Facebook, Intel and others. There will also be upstream Linux drivers as soon as the standard will be ratified. Pre-standard versions already exist. In fact, if you, like me, believe that the best thing about standards is that there are so many to choose from, NVMe/TCP is going to be *more* standard than NVMe/RoCE. Whereas RoCE is a niche technology in the data center, TCP is everywhere. NVMe/TCP will be everywhere as well.