The Earth's eccentricity is about 1 part in 300 along one axis away from being a perfect sphere, so it's frequently referred to as a spheroid. That's not enough for most people to notice when displayed at a reasonable size (the line thickness and projection will usually put in more visible distortion than the about 0.5% difference in position resulting from sphere / spheroid).

https://gis.stackexchange.com/questi...th-as-a-sphere does some computations to arrive at a maximum position error of about 22km (roughly 0.5%). For a 22" HD monitor (100 ppi), that's about 1/20 of an inch of difference maximum (and usually much less). Most folks that I've encountered wouldn't be able to generate data accurate enough for people to be able to register that level of difference.

For most hand-drawn maps of worlds made of low-strength internal materials that spin fairly slowly (that is, Earth-like worlds), this level of inaccuracy is invisible. As worlds get smaller or spin faster, though, they tend to get less spherical, but it doesn't usually get too bad very fast. Unless you're using GIS tools with relatively modern survey data (and whoever uses the resulting map actually needs that level of accuracy), the difference between a sphere and an ellipsoid for making maps is unlikely to matter to consumers of the map.