The Regular Expression: ^(As\s)(\w)(.+?),(\s\w) finds sentences starting with As ...., .
This is a common AI-ism that we want to find and replace by \U$2\E$3.\U$4\E to chop the sentence in two after the comma and start both sentences with capitals. Automagically.

Currently, this is not possible in Sudowrite, but should be working in Scrivener or Notepad++.
Can we please have this powerful feature in Sudowrite too?