I’ve got a couple of galvanized metal raised beds, but out here in the desert raised beds are less than optimal. In addition to needing a whole lot of water (and occasional shade), they attract mesquite roots like a magnet. Any tree in the area sends out miles of fine roots that soon choke the bed. If I’d known, I would’ve put down an impenetrable barrier. (I still may, but it would be a lot of work.) I’ve since learned that lowered beds are far more efficient in our climate, so I’ve dug and refilled with soil and amendments a small one as an experiment.
Lower beds around here make the vegetables seem like a smorgasbord to the groundhogs, rabbits, and chipmunks.