The article also says why they suck:

> Dumb TVs sold today have serious image and sound quality tradeoffs, simply because companies don’t make dumb versions of their high-end models. On the image side, you can expect lower resolutions, sizes, and brightness levels and poorer viewing angles. You also won’t find premium panel technologies like OLED. If you want premium image quality or sound, you’re better off using a smart TV offline. Dumb TVs also usually have shorter (one-year) warranties.