Yeah. Decay heat is still an issue but MSRs are inherently able to handle it without the need for active circulation. Plus if shit hits the fan like I said you can drain it out just with gravity into a configuration that is inherently unable to continue fissioning without the need for reactivity control. So, no need for active circulation pumps nor a reliance on the ability to ram in control rods... plus you don't have to worry about hydrogen buildup either.