I only voted NO because I see the formats as entirely different. Blu-ray is not just audio but a video medium, and SACD were only designed as an advancement in audio reproduction. Furthermore, DSD as ingenious as it is, is effectively not used in audio recording as others have already noted. This means literally all DSD recordings came through PCM and transcoded to DSD for that medium. I really do like SACDs for their simplicity of playback, but prefer Blu-ray discs. I must say that finding a player that supports SACD is easy, all three of my optical players, Oppo, Sony, and Denon support SACD. I see no reason why an audiophile would not have an SACD player in their rig and support labels that offer that format.
But, to be clear, when it comes to the Blu-ray disc, I see no reason for DSD to be supported on that format. PCM based audio sounds great and is very flexible.