I once read a fair amount of "real Shakespeare" theorizing - de Vere, Marlowe, etc. A few years ago, someone recommended I read Will in the World.
I got about halfway through the book (which does not iirc advance alternate identity theories), thought it was clever enough but nothing more than speculation, and vowed to read no more historical speculation re. WS. Thanks for the link, but no time for this latest.
[Added] Despite the fact that we'll never have real proof, I believe the identity speculation can be enjoyable in its own right for lifetime Shakespeare aficionados with whom all the textual allusions and linkages immediately resonate. But I lack that degree of erudition.