In very general terms, and in fear of stating the obvious:
- You do not see more solid silver cables due to cost of materials.
- Silver cables tend to sound fast, clear, and thin. I used a highly regarded by The Absolute Sound solid silver design when running Krell with Apogees in the late 90s to early 00s with good results. However, when moving on to more transparent electronics and speakers I moved to a more modern design copper which provided warmth and density, while maintaining detail.
- Cheap silver cables I have experience with sound etched and harsh.
Cheep copper thick and muddy. - There is much more to cable design than conductor material or solid vs multi strand. The materials and design of the dielectric, heat dissipation technology, conductor crystalline structure, and conductor geometry all play a role in SQ.