So you are a big fan of letting "perfect" be the enemy of "better."
That makes you kind of stupid. Please tell me what the perfect high-output energy generation technique is that produces absolutely no waste, and doesn't have a problem with periodic outage due to external forces that cannot be controlled (i.e. wind doesn't blow, clouds, winter)
Nuclear is better than coal and petroleum. Period. And this advancement of waste handling potentially solves a problem.
Not sure why:
A. you are talking about the United States at all, since this is a Canadian tech, that works with the waste coming out of Canadian reactor designs.
B. why you think that a technology that reduces the "highly toxic waste for which nobody knows how to get rid of" is something to shitpost
C. why you think people are just picking up chunks of Plutonium and dealing with heavy metal toxicity.
Anything that reduces the size and scope of radioactive reactor waste is a good thing, as long as it's not a pathway to weapons material extraction (i.e. proliferation concerns) - notice the summary says exactly jack shit about that.
Also note that chemical extraction of reactor fuel isn't exactly new - we've been doing it since the 1940s to get all the Plutonium we currently have, using a process called PUREX (Plutonium / Uranium Extraction)