The bottom line is the body makes, if you eat enough whole food and get enough natural proteins, BCAA's so supplementation is not needed? Is this the take away?
Oh but as the saying goes, Dr JIM; "everyone is different" bla, bla, bla, NOT!
BB are indeed different, however I am NOT referring to genetic alterations, but bc of the fact many are using AAS or a variety of other PED's that enhance PS.
Sure the accelerated anabolism places a higher demand on the presence of those substrates required for PS but what supplement manufactures rarely mention is, negative feedback mechanisms are intrinsic to almost all PS enzymatic pathways.
Now what does that mean. Pure and simple, if you don't use it you lose it!
In this instance I'm emphasizing the fact Amino Acid synthetic pathways are deliberately designed to PREVENT the accumulation the end product AA.
That's bc once again MORE is NOT ALWAYS BETTER and in this case can cause disease, such as: Phenylketonuria, Homocystinuria, Tyrosinemia and Maple Syrup Urine disease, the latter is due to the accumulation of Branched Chain Amino Acids specifically, (to name a few).
Ergo whenever AA, BCAA (in this instance) are ingested their endogenous production will simply decline and vice versa. Thus supplementation that exceeds the enzymatic threshold or metabolic need, will result in a diversion of pre-existing substrate (such Lucine that could be used to form IsoLucine) to form a fatty acid, as a precursor for another AA or if possible the formation of glucose. Yet excess BCAA just won't hang around in sera awaiting their calling.
So really in many ways what some guys end up doing, is forming nothing more than expensive urine when most "supplements" are used, or develop toxic side effects bc of hypervitiminosis.
Again I'm all for using a high quality AA "shake" which by definition (mine) should contain whey isolates, concentrates, aggregates OR egg albumin. Obviously ALL the EAA, yet especially Lucine, should be included.
I like AA shakes bc they are relatively cheap, effective, CONVENIENT, bioavailable, are literature supported, and readily ensures adequate amounts of ESSENTIAL AA are ingested on a regular basis.
SO ARE THOSE HORSE PILL SIZED BCAA's worth the cost or the difficulty associated with swallowing them? Not in my book 
(The same applies for most other "supps" specifically targeted at BB, imo)