have a hard time imagining it is that hard. I am sure it is easiest and causes the least problems if the horse just disappears
First pathfinding isn’t a thing that will be used outside of AI towns. Which is very specific. Programming it specifically for all roads and dirt roads on the entire map, just so you can imagine how realistic it is. Because for player it’s no different if Horse travels to you, or spawns behind you… Nope they won’t do that. There is no mounted combat announced, nor it is an actual mechanic. Rather than just a gimmick, like fast travel. Furthermore they have sort of basic pathfinding which allows your horse to follow roads. But it will be basic.
And it’s not about how hard it is. More about how annyoing it is. Imagine you whistling and waiting even 10-20 second for a horse. Now imagine standing there for 5 minutes. When the difference in first person, when horse spawns behind you is negligable at best. This is not horse game, there won’t be mounted combat, nor cavalry mechanics. So don’t expect advanced horse behaviours.