ThomasG77

Switch to OpenLayers e.g https://openlayers.org/en/latest/examples/index.html?q=mapbo... (the example can use Mapbox but any vector tiles styles are fine). It can consume Mapbox GL JS styles if using ol-mapbox-style project https://www.npmjs.com/package/ol-mapbox-style#olms. A bit slower but except this, most of the things are supported. PS: fine if you don't use 3D

For CSV export and import from any DB including PostgreSQL, you should look at CSVKit for this purpose.

Import with csvsql http://csvkit.readthedocs.org/en/0.3.0/scripts/csvsql.html and export with sql2csv http://csvkit.readthedocs.org/en/latest/scripts/sql2csv.html