In my considered opinion there are always fats and waxes and nobody is ever producing a wax free product (perhaps with the exception of by recrystallization for CBD/THCA).
If you think you’ve ever produced a 100% waxless extract, by any common method, I encourage you to try winterizing that extract with acetonitrile as the solvent… I guarantee you will see waxes drop that even methanol cannot drop… and for all I know, there are other waxes still remaining after that, that nobody has ever detected for lack of known way to test for them.