Yeah I’ve given up any interest. If another book comes out, there’s absolutely no reason for me to read it. Like you said, the last book is over 10 years old. So you’d have to re-read the entire series to catch up. Then you’d read the new book, only to be confronted with the same problem for the final book. I ain’t doing this whole thing again in another decade!
At this point, he’d have to release both books at once for me to have any interest in reading them again. And we all know that ain’t happening.