Actually I want to suggest this topic as well.

Modern breakthroughs for example Maxwell's Equation and Einstein's Relativity are both heavily relied on quaternion for their discovery. For Maxwell's Equation you only need one equation with quarternion instead of four separate equations as proposed by Heaviside!

The problem is that the majority of academics and scholars are still stucked with complex number, and they are the same people who are wondering why complex number concept was originally rejected by the academics and scholars when it was first introduced.