Am I missing something? Did they seal them with epoxy? Because plywood edges are notorious for taking in water and turning it into a swelling, rotting, falling-apart mess. If I'm making a counter top or low kitchen cabinet, I'm using solid wood or an alternative (preferably of whatever's at the local reclaimed building materials store)
For those into DIY, if you're going to remodel an entire kitchen, it's not hard to make your own wood faces of any size. You do need to buy a few tools, but they're tools you can keep using for decades. A circular saw, some pipe clamps and pipes, wood glue, a saw track, sandpaper + sanding block, and lots of 2x4s, are enough to make anything from dining tables to doors to kitchen counter tops to cabinet doors.