Should there be an example for .finalize() + invalidation? It would seem that cleaning up after a view is especially important in the context of Observable, where cells can be rebuilt rather frequently.

Yeah, that would be good. I don't know how Observable signals unloading a cell. Do you have a suggestion?

In each cell you have access to an "invalidation" promise that resolves when the cell is updated. To give a code example: invalidation.then(() => view.finalize()); where view is the return value of the resolved promise that is returned by embed. The snippet is taken from https://observablehq.com/@mootari/optimal-tiling#view More details about invalidation can be found at https://observablehq.com/@observablehq/invalidation

Awesome. Moving to https://github.com/vega/vega-embed/issues/540

Any attempt to include slippy maps (Leaflet) as a Vega component to build interactif dashboard (http://climateproxiesfinder.ipsl.fr) ?

There is https://github.com/nyurik/leaflet-vega.

Any demo from Observable with a simple example ? Or even better, a dashboard with interlinked plots ?

I won't have the time to do that. Please ask on SO or Slack.