Drop Mambaforge Python distribution, add warning regarding Anaconda (#…

…12898)

Co-authored-by: Daniel McCloy <[email protected]>

doc/install/manual_install_python.rst

@@ -8,10 +8,19 @@ Installing Python
 MNE-Python requires Python and several Python packages. MNE-Python
 version |version| requires Python version |min_python_version| or higher.
 
-We recommend using a conda-based Python installation, such as `Anaconda`_, `Miniconda`_,
-`MiniForge`_, or `Mambaforge`_. For new users we recommend our pre-built :ref:`installers`,
-which use conda environments under the hood.
-
+We recommend using a ``conda``-based Python installation, such as
+`Anaconda`_, `Miniconda`_, or `Miniforge`_. For new users we recommend
+our pre-built :ref:`installers`, which use ``conda`` environments under the hood.
+
+.. warning::
+   Anaconda Inc., the company that develops the Anaconda and Miniconda Python
+   distributions,
+   `changed their terms of service <https://www.anaconda.com/blog/update-on-anacondas-terms-of-service-for-academia-and-research>`__
+   in March of 2024. If you're unsure about whether your usage situation requires a paid
+   license, we recommend using Miniforge or our pre-built installer instead. These
+   options, by default, install packages only from the community-maintained `conda-forge`_
+   distribution channel, and avoid the distribution channels covered by Anaconda's terms
+   of service.
 
 .. _other-py-distros:
 

doc/links.inc

@@ -110,10 +110,10 @@
 .. _anaconda: https://www.anaconda.com/products/individual
 .. _miniconda: https://conda.io/en/latest/miniconda.html
 .. _miniforge: https://github.com/conda-forge/miniforge
-.. _mambaforge: https://mamba.readthedocs.io/en/latest/installation/mamba-installation.html
 .. _installation instructions for Anaconda: http://docs.continuum.io/anaconda/install
 .. _installation instructions for Miniconda: https://conda.io/projects/conda/en/latest/user-guide/install/index.html
 .. _Anaconda troubleshooting guide: http://conda.pydata.org/docs/troubleshooting.html
+.. _conda-forge: https://conda-forge.org
 
 .. installation links