I can’t really think of any over eager findings in the past years. Plenty of fluffy university press releases and the perpetual 20 years from now. But this is the first fundamental breakthrough that has had any stick. Skepticism is always warranted but the other results like the university of Rochester superconductor was met with extreme skepticism at first (and has been shown to be warranted). Lk99 had the combination of big result, AND importantly “easily” testable, despite low yield rates.