Well, Rin needs to both find out about her and then go and meet her....
archer can bring sakura to her.
Well, yes, but that would mean leaving Rider, who is her lover and also training her.
Ah, OK.
It's just that modern tech provides for more interesting ideas for training....
contextually modern tech would be out of place.
Not necessarily. A feudal-style system doesn't mean feudal-era technology. And, it makes travelling a
hell of a lot easier, too.