Portals are a huge QOL feature. Yes, they break immersion, but seriously, walking from a to b and back again just because isn't exactly 'fun'. That said, I find myself very much in agreement with earlier posts that portals need explanation and a good, solid lore appropiate reason why the player can use them.
Fast travel doesn't have to mean portals ....
Yeah I thought OPs title would help people who aren’t getting it, but it still seems to be confusing people. Travel can still be instantaneous from a player perspective, just make it offscreen. Look at Valhalla as a modern example, you can fast travel but your character isn’t actually magically teleporting around the map.
