I'm also in full agreement on the flexibility, versatility, and endless possibilities the dry samples/Mir provide to sculpt and shape the sound you need for a wide variety of genres/styles. I do have the Synchron Strings, but as of yet, have not found them to be more useable than the dry libraries. There are idiosyncrasies, owing primarily to the way the extra velocity layers seem to affect the ease/playability of the Synchron Strings, that in no way improve my workflow, but rather hinder it. My interest in the Synchron Strings when they were first advertised, was the ease of use; my hope was that they would enable me to realise my musical ideas more quickly. Instead, I find that they have the opposite effect, requiring significantly more time to shape/sculpt a convincing performance, and one that still does not give me the same aesthetic satisfaction that VSL's original libraries do.
In my opinion, VSL could borrow from the slogan of a breakfast cereal: Kelogg's Corn Flakes was marketed as "the original and best" despite dozens of flashy/sugary/fun-shaped cereals that looked more appealing on the box. It's what's inside that counts, and VSL's dry samples, as William and others have stated, just "work."
Dave