Meanwhile, you can create a list from a text using TIDs (text item delimiters). You can use them directly from a “read” command as follow:
read alias "path:to:file.txt" using delimiter ","
Here, you’ll get a list of texts-between-commas.
If you text doesn’t come from a “read” command, you can accomplish the same as follow:
set theText to "joe,moe,toe"
set AppleScript's text item delimiters to ","
set listFromText to text items of theText
set AppleScript's text item delimiters to {""}
listFromText --> {"joe", "moe", "toe"}