The Tacan forum thinks this story is utter nonsense. Make it outrageous and get clicks and subscriptions. https://www.taycanforum.com/forum/threads/bizarre-whistleblower-claims-%E2%80%9C60-of-all-delivered-taycan-have-battery-issues-that-caused-replacements-damages-and-fires%E2%80%9D.7809/page-16
Same with the comments to the original Teslarati article. Porsche Whistleblower: “60% of all delivered Taycan have battery issues that caused replacements, damages and fires”