Problem/Motivation
Follow-up from #2859197: Document that block_content entities are not designed to be displayed outside of blocks. Rendering of custom blocks doesn't work outside the blocks system, but we allow custom block entity reference fields which means this can happen purely via the UI.
Comments
Comment #2
luke.leberAdd related issue where some discussions already took place.
Comment #3
luke.leberGiven that users (ourselves included) have been doing this for 5+ years and have now-ancient business processes built around it, I think it's a little bit late to simply decide that it's no longer allowed.
Berdir brings up the point of performance in #2704331. I'd like to drill down and quantify those concerns in more detail.
Comment #6
smustgrave commentedBelieve this is the same as https://www.drupal.org/project/drupal/issues/2704331