All Caminos are marked with yellow arrows. Some are better marked than others but on the Camino Frances (the main one) you could easily walk the entire 800 kilometers without a guide or a map or a gps, just following the yellow arrows. They are friendly and reassuring. They always show up when you need them.
They also mean that you can walk without a care, thinking about things, without worrying about navigating, just follow the yellow arrows. I guess this is anti-mindful but, I think, in a good way. You get lost in the process which is part of what a Camino is all about.
GPX tracks do this in a way also but in a very techy way. Sometimes they seem to consume a lot of your attention and make you concentrate on the path rather than the journey. I guess it is how you treat it. I tend to look at my phone a lot and keep track of where I am.
When you are a double (and triple) checker like Wynette they are great since you know you are on the correct trail.