Document that scipy.fft is preferred over scipy.fftpack
.. module:: cupyx.scipy.fftpack
-Discrete Fourier transforms (``scipy.fftpack``)
-===============================================
+Legacy Discrete Fourier transforms (``scipy.fftpack``)
+======================================================
+
+.. note::
+
+ As of SciPy version 1.4.0, ``scipy.fft`` is recommended over
+ ``scipy.fftpack``. Consider using :mod:`cupyx.scipy.fft` instead.
Fast Fourier Transforms
