You have to discern the advantages of RCDischarger vs a power supply, not necessarily the advantages of high current discharging.

RCDischarger allows you to free up a bank you normally plug the shunt into because you are utilizing the regenerative current flow of the Icharger. It's pretty simple.

Not RC car guys but airplane and heli guys have made DIY setups for a long LONG time. Ever since 4010 came out. RCDischarger does market, package, 3D print, and come up with a really nice product but there isn't a component of an RCdischarger that is proprietary. It's a one stop and shop, all in one, all put together solution. A lot of racers use it and like it. In the broad spectrum of our hobby the pricing is fair for what you get.