Someone tried traveling to another star system without fast travel, and ran into an invisible barrier
That to me says EVE is not a true open world MMO
In Skyrim, you can go anywhere in skyrim without loading screens. Sure you got loading screens to cities and dungeons, but mods fix that to make it a true open world game with no loading screens anywhere
In Mad Max game, the entire world is truly open, you can even go off the map if you wanted to, no invisible barriers
And then EVE...the maps are truly big, yes...but there is invisible barriers to get to another star system. NOT open world
It is a good sandbox MMO however and the only good one. It offers content for all playstyles and types of players.