I have begun to have this realization as well.
Recently I got a big, free bag of Salvia from a spice supplier.
After the spice ran out, as it quickly and frequently does I started smoking some of this sally. I am going to ask the spice supplier what is up with it but I believe it is home grown. It is very leafy, very well dried and very well diced. It is nothing like the shit one gets at a shop.
I have only purchased Sal twice. I forget what extractions, but the first time the sally was super intense. I liked it but it was fucking bonkers. The second time I bought some it was underpowered, which sucked because I was trying to warm up to my first experience with the spice so I wanted it to be powerful.
Whatever this stuff I have is, it is smooth and its smooth effect lasts a long time. I can finally agree with that Divinorum tag.