I don't think I've ever actually seen vertical battens on a cruising boat yet over here
I saw them last year on a sail at the Easton, MD Evolution loft. It's not a great solution because it's very difficult to control the shape of the sail with vertical battens. As with anything, it's a compromise. Proper shape vs. the ease of in mast furling. IMO, it's a sail
boat, so I opt for shape.