<p>WRT editor integration, repeating what I pointed out on the relation size limit issue, and elsewhere, any kind of limit/block/whatever that potentially will cause the contributor to loose their work, needs to be detectable by the editing application in advance. This will allow a app to prevent the user in a suitable form from continuing to edit, or at least point out the potential frustration.</p>
<p>This ranges from maximum upload limits as originally discussed, over changeset review queues (which for example would need to block further contributions from editors in the same area), to any kind of data model limits (relation member size limits for example).</p>

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