User blog comment:SuperSpruce/What do you think the growth rate of the Meameamealokkapowwa oompa is?/@comment-36984051-20190419200104/@comment-35470197-20190420052006

@Ecl1psed276

I add that Hyp cos also said that he had never seen any well-defined extension of BEAF beyond {n,n/2}. (So his analysis is based on assumptions that it can be extendable in a "desired" way.)

As PsiCubed2 pointed out, "how big it is" is meaningless. We can state any result according to our own (but not common) "desired" properties of extensions of BEAF. Therefore you have no reasonable way to decline SuperSpruce's guess unless you examine what "desired" properties are assumed.