Is there any conclusive evidence that fast charging impacts battery health more quickly than standard, slower charging?
My current phone supports fast charging, and while battery life has never been great, it's certainly worse now than it was six months ago when I got it (phone is two years old).
Not sure what the verdict is, but doesn't appear to be a known or major issue as far as I've read.
Fast charge away.
For what it's worth, Samsung probably is in the lead of preventing battery degradation. The S8 promises to retain 95% of it's battery effectiveness over a year and the Note 8 does it over two years. Samsung didn't just bounce back from the battery debacle, they went ahead and just straight up took the lead. Their 8 step battery QC process is industry leading, too.
Hopefully Google didn't cheap out on the battery quality given the insanely fast charging they're promising.