How so? While there are indeed problems with the gen 5s, everyone here who has the gen 4s before (including myself) think the gen 5s, on balance, are an improvement. The bass was stronger on the gen 4s but they were more muddled. There's also the port-block mod for the gen 5s to tune up the bass if you need more.
The gen 5s have cleaner bass. There are some issues with the "s" sounds being harsh, which may correspond to the 12-13kHz peak on the chart that
@HiFiChris
has kindly provided on post #132. Some have been able to mitigate this by inserting the buds deeper into the ear, or swapping tips. Overall the gen 5s still has a V shaped sound signature which should be suited to your music prefs.
Bottom line, for the price, these are a no brainer for me. I have yet to come across any mainstream brands that have this sound quality at this price point. That said, I'm buying these directly from xiaomi, and some others here have said shipping + customs costs can double the price...