"Word of God kinda"

From Doug Wilson:
Last night I recorded a discussion with Adrian Warnock on cessationism. It will be available this coming Saturday — Premier Christian radio site will stream live on Saturday at 9:30am ET or 2:30pm UK.

As I hope the discussion will make clear, I know and understand that responsible continuationists affirm the doctrine of sola Scriptura. What I do not yet know, despite repeated questioning, is why they do.

My trouble is this. I have no category in my mind for prophecy lite, or Word of God kinda, or deutero-God-said.

If Henry Smith says, “God said x, y, and z to me,” that claim is either true or false. If it true, then what is the distinction in authoritative status between what God said to Henry Smith and what God said to Jeremiah? What possible basis could I have for taking one of them less seriously?

It is a serious question, and while I believe we had a robust and charitable discussion, I don’t believe it was addressed.
These are precisely my questions when I hear people claim, "God said to me," or "I felt God telling me..." Is Scripture not clear and sufficient? Has God promised to add to his authoritative and unerring word, a less authoritative, unclear, and possibly erring word?

You may want to read my thoughts on Sarah Young's Jesus Calling.