Unanswered QuestionsHas MRT replaced SPE as the separation method of choice or is SPE to be used in conjunction with MRT? Could SPE have been flawed or unable to be proven at scale? Seem like MTR is a more proven technology and has now been used for HREE separation for the first time. Should be more reliable at scale but still needs to be proven at this point. Still some unanswered questions hanging out there.