A very simple one: the DSD catalog is very limited.
Are you going to spend $$$$ on a DAC for a couple of downloads you might like?
DSD is a bit of a funny format.
Compared with PCM DSD has a bigger dynamic range and a substantially wider bandwidth.
The downside is the quantization noise. In case of DSD64 this noise creeps up close to the 20 kHz so inside our audible range and rises to a very substantial level.
