Mosfet thermal problems in linear applications
Sprito effect shows up on trench type MOS devices operated in linear mode, due to uneven cell-to-cell matching. Non-trench (planar) MOSFETs don't suffer this issue so much.
As far as SiC? Probably, again, depends on structure. Trench devices could have the same hot-spot problem in linear mode due to mismatched cells. You'd probably have to ask the vendors for details.