Here its the issue, this world has been around sine 1967 and in DnD since it's inception there is lore for this world for a reason. If you want a warp portal every 20 yards in your game DON"T put it in an already established world. Would be like someone taking Lord of the rings and putting in a F-16 fighter jet just because. They make 0 sense at all in this world. The maps are small enough as is to get around without it.