I'm using AI to write PBP code for latest months and it has significantly improved - gone syntax issues, like using proton basic or C++ style code in PBP. Also, it no longer invents new types of variables or statements. However, two issues are persistent:

1. Use of reserved words like DATA, LOOP and so on for variable and subroutine names.
2. Code sequencing - subroutines might be placed before the main code, so it will never get to the main code.

But anyways, improvement is significant and noticeable.