Indeed, for most of the early commentators, this version was: "And whoever elaborates on the Exodus from Egypt, behold, it is praiseworthy. And the Abarbanel challenged their version, that it does not make sense in the context of the mitzvah to tell the story of the Exodus from Egypt, in which one fulfills his primary obligation to tell the story of the Exodus from Egypt on the Seder night, to give him praise for his story is praiseworthy, for he only fulfills his obligation without any addition, and there is no boundary of praise here."