When a feature is not compatible with SPA Editor this should be indicated. Otherwise developers will try to use the feature and will not succeed and will be confused about what they are doing wrong. Also it is important to know upfront what is supported in order to plan a project appropriately.
In documentation, anytime a page templating feature is not supported in page editor, this is indicated.
Including (but lets research if there are more):
- Component inheritance is not supported and should be indicated as such.
- Component Autogeneration