FWIW... I went back to the first few pages of this thread and the first mention of the apple watch was Monday around 1pm Arizona local time, and then not talked about again until hours later.
I think I started reading here Monday night/Tuesday morning, and all the posts about the watch, I couldn't figure out if she left with or without it or if it was all speculation.
No idea when the Media ransom note was sent, but it's been suggested 'Monday morning'.
TMZ made a point of correcting their first statement, that the note said something about what she was wearing and it actually said something she was NOT wearing. (if that is in regards to the watch? who knows)
The FBI guy said something about Ransomware. And the note was in Ransomware format. I had to do some searching. This is typically used to hold data/computer systems 'hostage' until a ransom is paid. It pops up with information on what and how to do it, but I don't know how Ransomware would be used in real life kidnapping scenario? And if there is no way for the family to get proof of life, what does the family do?
The FBI did answer a question about the bitcoin addess that was in the Media ransom note, and said that they have not been able to connect it to anyone.