It's worth noting that there's also gallium nitride to consider and while it isn't as good as silicon carbide in high temperature applications or areas needing higher thermal conductivity it's better than silicon carbide as far as breakdown voltage and low resistance are concerned. Maybe eventually we'll see GaN in server power supplies and SiC in VFDs for fans, cooling, and DC infrastructure. There might even be a justification to use SiC solid state transformers to bridge between utility power, generators, battery banks, etc.

It's very important to note that 50% efficiency gains might not be as huge as it sounds given that we're just talking about losses in MOSFETs. This isn't going to be turned into your next CPU or show the same kinds of efficiency gains in logic circuits.