Stratify - Iris interface difficult to use.

[HGWright]

see SciTools/iris#5298

This was build for a narrow use case. I think given that there is interest in a more general version we should look into rewriting this interface.

[github-actions]

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[HGWright]

this is still relevant

[github-actions]

In order to maintain a backlog of relevant issues, we automatically label them as stale after 500 days of inactivity.

If this issue is still important to you, then please comment on this issue and the stale label will be removed.

Otherwise this issue will be automatically closed in 28 days time.