Sure, titles like Amadeus, Superman, Titanic, and The Abyss would greatly benifit from DTS, but would you pass on a movie such as Citizen Kane because it has no DTS track?I'm nothing even close to expert on these matters, but given my understanding, there is no reason whatsoever for any non discrete multichannel soundtrack to be either Dolby Digital or DTS.
For mono and two-channel stereo soundtracks, it's my understanding and experience that LPCM is, by far, the preferred format.
So, my response is that Citizen Kane should have been given an LPCM mono soundtrack, which would sound far superior to either a DD-mono or DTS-mono track.
So consider me "pro-DTS" for discrete multichannel formats, and "pro-LPCM" for all other soundtracks (mono and two-channel stereo).