> WGS84 is not a projection but just a reference ellipsoid used for distance calculations along earth's surface.

Fair enough, it only handles a single GCS and no PCSs.

WGS84 is more than just a datum, it is a GCS. It's also used for more than just distances; it defines a mean sea level used for elevation as well.

WGS84 is also used to mean EPSG 4326, hence why I asked like I did.

> There are many independent tools available to perform such projections if you need to draw a map or convert to a Euclidean coordinate system

Sure there are, but if I can't import EPGS 4269 (NAD83, used by the census), EPGS 3857 (Spherical Mercator), a state plane, or a UTM data source without first converting it, then I need to know that.