Fast charging kills batteries much faster, it always has been, but I get the impression that the manufacturer’s numbers are intentionally underestimated.
800 cycles, 2 years with 80%: this could be the use of a normal recharge. But the goal of fast recharging and recharging as soon as you need it, not to wait until the evening to put your smartphone on its base, so the user will recharge it at least 2 or 3 times a day: if only the recharge “just in case”.
The number of cycles for fast charging use is really very low, and that a smartphone is at 80% only after 2 years: I absolutely do not believe it: it would tend to be after a year.
So it offers fast recharging for classic everyday use with one charge per day …