Six views set dataReady (which removes the LoadingGlobe) straight after addSource(). The engine
then still tiles tens of thousands of points in its worker, so the globe vanished and the map sat
empty with a full legend. Measured on the DX-life gallery: 0 features for 20 s, then 19,376.
whenGeojsonDrawn(map) resolves once every GeoJSON source is loaded AND a frame has rendered
(not 'idle', which an animating map may never reach), with a 45 s cap so it can never hang.
Religion, pins, coverage, translations, language families and Rosetta cards await it before
dataReady. Plugin-local: pplrData.js has no consumer outside pplr-data-maps.
Headless proof: a fake-map unit test (already loaded / last source late / never loads -> false at
the cap / style mid-swap / no map), 9/9 pass; BUNDLE=pplr-data-maps build + tree + check:sri PASS.
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