Headphones allows me watching and listening hours I would not get otherwise, and my ears are fine. I have some very good headphone playback and disappear into the music sometimes, often even surprised to do so.
Many early stereo recordings I enjoy in mono. I dig that Atlantic Coltrane box set, and the Miles Davis box set, the Dylan box set, and the Beatles box set and. . .lots of non-box set items such as Teagarden on Roulette and Monk and Messengers. . . many more. Mono is very nice, especially when you aren't tied to the listening sweet spots.