Based on some offline discussions with users, it may be time for some refinements to the install instructions. Specifically, we should make it clear that:

1. if they want to update mne-python, it's usually best to just pip install -U mne
2. if they want to update everything in their environment they should create a new environment instead of using the latest environment.yml to update an existing environment
3. (optional) given item 2, perhaps a "pro tip" would be to keep a list of other packages one installs into one's mne environment, to simplify the creation of new mne envs
4. consider revising our environment.yml to not include an env name, and update the recommended install command to conda create --name mne --file environment.yml instead. The rationale here is that the current recommended command conda env update --file environment.yml implies that it can be used for updating

cc @NeuroLaunch @larsoner was there anything else from our discussion that I've forgotten to include here?