In my experience, this bug - lags and overheating when drawing with the Apple Pencil - exists since iPadOS 16. When searching for it on the web, I found lots of reports and no indication that it is solved, including by hardware replacements.

In any case, HN's guidelines ask to use the original title of an article, unless it is misleading or linkbait. I'd agree that Apple's software quality has been going down.