Sorry I painted too wide a brush... Some of the examples are integration examples, and I fully expect we'd have at least one example for Mapbox, Google Maps, ArcGIS, and hopefully more providers in the future.

The rest of the examples are to show deck.gl's capabilities. They currently use Mapbox GL JS v1 (recently changed to use Carto's basemaps so that new users can test deck.gl without any API key). Those examples focusing on deck.gl are what I meant to refer to originally; it seems unlikely we'd move them to GL JS v2, at least, because we aren't currently using Mapbox services with them. (But again, the team hasn't had full discussions about this yet).