I’m sure that Grimme and van den Branden were well intentioned, and I believe that Petrovich is as well. But the evidence is weighty, and the evidence demonstrates the following: the inscriptions from Serabit el-Khadem and Wadi el-Hol (and various other second millennium sites, etc.) are written in a Northwest Semitic dialect of the early Second Millennium BCE. In terms of the name for this language, the most apt term is “Canaanite.” After all, there is nothing distinctively Phoenician, or Hebrew, or Aramaic, or Moabite, or Ammonite, or Edomite about the words in these inscriptions that would reasonably allow someone to call the language of these inscriptions by one of those terms. Indeed, the words in the inscriptions from Serabit el-Khadem and Wadi el-Hol are found in lots of Semitic languages, not just one. Thus, the best term of the language of these inscriptions is “Canaanite.”This post responds to Petrovich's reply to Rollston's first post.
And as for the script of these inscriptions from Serabit el-Khadem and Wadi el-Hol, the best terms are “Early Alphabetic,” or “Canaanite.” Some prefer the term “Proto-Sinaitic Script.” Any of these terms is acceptable. But it is absolutely and empirically wrong to suggest that the script of the inscriptions from Serabit el-Khadem and Wadi el-Hol is the Hebrew script, or the Phoenician script, or the Aramaic script, or the Moabite script, or the Ammonite script, or the Edomite script. ...
Background here and here.