In law, sometimes a single case decision opens the flood gates. This is an oft-heard argument, with a rarely seen result, yet in legal malpractice the Ulico v. Wilson Elser, 56 AD3d 1 (1st Dept, 2008) case seems to have accomplished the re-awakening of "breach of fiduciary duty."
As an example, see Colucci v. Arisohn