I have heard that Ubaid period language change assertion before.
You do range around the early books of the OT for all this.
As for the Exodus — I listened to a few minutes of the Sparks interview and will return to it when have more time.
But really??? So much is said and un-said on many of these subjects, and it almost amounts to who or what are you going to believe?? I have read a lot of 18th and 19th and early 20th century arguments about the events of the book of Daniel ,for example. Whom are you kidding? Belshazzar? No such person!! How could lions ever be put in dens? How would they breathe in those dens?? Is it spelled Nebuchadnezzar or Nebuchadrezzar?
And then they found something with the name Belshazzar on it, and yes the ancient Babylonians and Assyrians kept lions and other animals in dens, after all…And Nebuchadnezzar did, it seems drop out of sight for a few mysterious years.
The Bible does not explain things in great depth. It just gives sketches of events and then moves on, leaving us to wonder.
Anyone who has done family history knows how hard it is to find great-great-great grandparents who only died 130 or so years ago. The first born sons of every Egyptian? from 1250 BCE or so? No surprise to me that we don’t know much about that. I do think there is record of some pharoah having lost his first born son, but then that may have happened for many reasons.
I guess my position is that the Bible has a lot in it that has turned out to be valid. The early Exodus chapters do, for example, show great familiarity with Egyptian practices, for example. The writer(s) of Exodus knew this — how??? So we shouldn’t discount the book whole cloth…