"According to preliminary estimates, the battery capacity of a 100W fast charge loses about 20 per cent of its capacity compared to a 30W PD fast charge," his (Google-translated) post reads. "Simply put, 5,000mAh becomes 4,000mAh."
No thanks. I bet there is accelerated long term degradation of the batteries too. Personally fast charging just isn't a selling point for me, I stick my phone on charge when I get home, it's charged when I need it, and there never seems to be a big rush if I need to top it up at desk or in car. I suppose there must be busy bees rushing around that would actually benefit from the few minutes saved, but personally I'd find the opposite a selling point; give me a slower charging phone that promises the minimum possible battery degradation over its lifespan, I'd take that. Dell offers a long-life battery option with its Precision laptops that does that, slower charge in exchange for longevity. I took that option, only time will tell if it actually delivers, but the previous machine's battery didn't make three years.