Does the Principle of Least Action Have a Physical Meaning?

[Stephen Tashi]

Being fundamental and being physically meaningful are two different things. Do you have a reference for a claim that the PLA is not physically meaningful?

Back in post #21 there is a link to a paper that points out that "the principle of least action" is an ambiguous phrase. The paper distinguishes two versions of the principle of least action. The two versions have different physical meanings. So, yes, there is a source that says the PLA "is not phyically meaningful" in the sense that it does not have a unique physical interpretation.