PS Audio has a small but interesting downloadable library of DSD albums on their Octave Records label. All these titles were mastered in DSD so you get the full benefit of what DSD has to offer
It is mostly smoke and mirrors. Your statement can’t be correct because it is impossible to master in DSD, so if it is recorded as DSD, and very little is, then it has to be converted to PCM for mastering, then back to DSD. Almost everything released as DSD was recorded as analog or PCM then converted to DSD. Even if recorded as DSD it was almost certainly DSD64 so anything released at a higher rate was converted.
Most DACs then take these DSD files and convert them even further either to high rate PCM (Mola Tambaqui) or upsample them to higher DSD rates (EMM, PS Audio, DCS, and others)
notice the pattern? These DSD files which so many covet are almost always converted from something else when produced and often multiple times, and then converted even further when you play them back, So the idea that DSD is somehow inherently superior is mostly smoke and mirrors since you are very rarely listening to something that hasn’t been processed and converted multiple times.
And of course, the Boston DSD referenced by the OP, like most DSD available, had to be converted to DSD because DSD didn't exist back then.