A month ago today, I stop by a local thrift store and find an MGM DVD of 2001: A Space Odyssey. Less than a month later, I upgrade 2001 to Blu-Ray via an eBay lot that also included the soundtrack on CD. And yet I’m still keeping the DVD because of it’s original 70mm six-track audio.
Just in case you didn’t know, the newer Blu-ray actually includes the original audio mix, not to mention it has a much better transfer than the older Blu-ray.