Official BeOS demo
https://youtu.be/BsVydyC8ZGQ?si=LkxP3P7WA74tPFzP
« Running on a special machine » a dual pentium 266 Mhz (hardware released in 1996).
So yeah when I see software is generally sluggish on our cheap quad core 1+ GHz boards I come to the conclusion we’re doing something wrong as a species. Sure they didn’t play 4k videos back then but after 30 years I’d expect a bit more.