Not everyone wants the Tasha's cauldron additions in their 5e game - it is not core 5e, but something you can *elect* to use. BG3 was only ever referred to as a 5e game - and "the definitive 5e game" (or some such) at some point - not 5.5e, or DnD One or whatever the next iteration is (which I will be skipping). When I shelled out money, years ago, that was what I was expecting - not the 5e+/Larian hybrid we're seeing now.
Tasha's is a 5e rule-book.
It's not 5.5 or D&D One.
When you shelled out money years ago the website said based on 5e rules.
Tasha's are rules from 5e.
