Because the whole point of the backronym is and always has always been to sound cool. Microsoft was excluded from FAANG for no other reason than it couldn't fit

Because the whole point of the backronym is and always has always been to sound cool. Microsoft was excluded from FAANG for no other reason than it couldn't fit and still make the acronym cool. It's the same reason the acronym has not been FAAAN; FAANG is obviously cooler. As soon as Facebook became Meta, that opened up all kinds of new acronyms and now Microsoft is in and Netflix is out, because MAGMA is the new hotness.