At the risk of beating a dead horse, I wish Star Wars made more of an effort at depicting these ancient Jedi sites as something that would have existed in an already highly advanced technological society versus the quasi-Bronze Age ruins that we keep seeing (e.g. Ahch-To, Jedha, Tython).
They don't have to look squeaky clean like the bridge of a Star Destroyer, but the Jedi have been traveling the stars for over a thousand generations. I wouldn't expect even their oldest temples to look like something out of a Bible movie.