Here's a highly speculative conspiracy theory: Recently, since build 10581, MS is, has been, & will continue to keep new/RTM mobile builds out of insiders hands on purpose until the Lumia 950 & 950XL are released and reviews are written. Why? So negative reactions and a thorough vetting of what still doesn't work in W10 mobile by insiders doesn't cloud the product launch & initial holiday sales or generate more negative details about W10 mobile for press reviews of the 950 series to include the salacious details of (i.e. bad press). Anyone gripped by this admittedly unsubstantiated hunch?