The article writer should try or have tried Asheron's Call. The game had a gigantic world to explore with little details everywhere. It would probably take days to run end to end. The game did have ways to travel fast though.
Like other games players needed somewhere to reappaer when they die, AC had lifestones, AC had HUNDREDS of lifestones. Towns had them but some wilderness areas had them as well, there were even a few rare ones inside dungeon areas. Early on in the game players had to die to get back there but that was eventually fixed, much later players got the ability store a second one accessible with spells.
Traversal of the great seemless world could be accomplished the same way as going inside/outside of dungeons - portals. In some areas there would be loops of quickly accessible portals to use like a transit system through the towns. Others would send the player to far off areas without a return. Players could save two of these with magic and summon them for themselves and others so that players could get back to that very far away place instantly, and bring friends. More and more special portal spells were added to the game over time giving the player instant access to special areas, usually islands added onto the game in patches.
The addition of landscape housing made traveling anywhere in this gigantic game easy. Near towns there would be portals to a dozen settlements of housing, Now 90% of the mainland in the game was accessible in less than 5 minutes.
AC had a large unique sandbox world to explore and did not force the player to spend hours running if they did not want to. It was the todays "next generation mmo" in many ways but released in 1999. Oh and players ran really fast!