FWIW: I often use both rope & wedges. As others have posted; they both have their place. In fact, the only time I don't use a rope is when the tree has a favorable lean and there is zero chance the tree will get hung-up in another tree. I've found, the hard way, that setting a line in...
I am devoted to SRT. But, there is a caution with SRT that is not an issue with DdRT and not often discussed. I've posted it before and, FWIW, deserves to be mentioned again:
Since SRT rope does not move up & down during work like DdRT, the SRT rope can be damaged if the same spot on the rope...
To follow the lead of @DSMc and @Tom Dunlap — For years, I've struggled with how to explain why the same system can be called a 3:1, while some call it a 2:1. So, I made a little diagram that might help. It all depends, like most things, on your frame of reference. The exact same system feels...