Its always tough to generalize, but the long term trend has been for solid state to less harsh and grainy and tubes to less lush and syrupy. Or solid state more full and rounded and tubes more tight and clean. However you want to put it.
Why is probably because most of us are trying to get to the truth, and so over time the two approaches are bound to converge.
Why is probably because most of us are trying to get to the truth, and so over time the two approaches are bound to converge.