  The Ryu-Takayanagi (RT) formula has been a key ingredient in our
understanding of holography. Recent work on TT deformations has also boosted
our understanding of holography away from the conformal boundary of AdS. In
this short note, we aim to refine some recent work demonstrating the success of
the RT formula in TT deformed theories. We emphasize general arguments that
justify the use of the RT formula in general holographic theories that obey a
GKPW-like dictionary. In doing so, we clarify subtleties related to holographic
counterterms and discuss the implications for holography in general spacetimes.
