Exactly. So now using the old definition can be ambiguous and has to be replaced by something 'wordier'. I can't do anything about it but I do think it's a shame.

The idea that "rightful entitlement" has a much older heritage than "perceived entitlement" doesn't seem supported: https://languagelog.ldc.upenn.edu/nll/?p=4240

> The earliest cluster of uses of entitlement meaning "(rightful) claim" that I've found is associated with post-WWII veterans' benefits, as in this 1947 Popular Mechanics ad

> In the 1960s, psychoanalysts also start using entitled and entitlement with strongly negative connotations, resulting in the emergent term of art "narcissistic entitlement".

> Meanwhile, by the 1970s, the phrase entitlement programs is being used in its modern sense (defined benefits paid by the federal government) in discussions of the federal budget — and the connotations are by no means positive.

>Meanwhile, by the 1970s, the phrase entitlement programs is being used in its modern sense (defined benefits paid by the federal government)

Right, but that's not the modern sense for the 1.2 billion English speakers who are not in the US