Mailorder became a happening phenomenon about 10 years ago when EHS... Eckerd Health Systems, PBM... mandated that PBM-controlled RX's must be filled via mailorder. You remember. Ten years ago when WAG stock actually went up, and even split.
Mailorder is now 30%+ of the former retail Rx market and is poised to double-and-a-half.
The "experts" you cite appear to have been correct. You appear to be "ivan."