I simply don't understand how one can conclude that dragging a diamond
through a plastic trough doesn't cause wear. It defies logic, physics,
and study.
It does wear, but takes a *lot* longer than the studies done in the early 1960s concluded (which are the studies most often cited in this regard). A lot has happened with cartridges and tone arm tech since then!! Most audiophiles I know don't listen to any one title long enough to actually wear it out; IMO this just simply isn't an issue.
There are ways to get clipping characteristics out of a transistor that are similar to a tube. It's just not done often.
The way to do it is to use SITs (Static Induction Transistors) aka VFETs. They have linearity similar to triodes and do have a soft clipping characteristic. They are the only such devices that have these properties other than real triodes. The problem is no-one makes them anymore, and further, no-one ever made driver and low level signal versions- just outputs. They've not been made since the late 70s or early 80s. The industry doesn't want to make linear devices anymore- everything is 'switching' to switching. That's why class D is on the rise.