That's a good question, and a tough one to answer.
After all, every user is different, and even being able to ascertain average usage and behavior is difficult.
The. Q-charge technology is still fairly new, and every generation gets its improvements, but I'd venture to say that yes, by the time the average user would tend to notice a battery issue, they are ready to replace their phone anyway. I think that's what manufacturers are counting on and why they are okay with non-user-removable batteries and quick-charging schemes.
There will always be those who will want to use their equipment beyond engineered life spans, and those people will find ways to get around the battery issue, among other problems.
And, of course, there are those who will throw a ruckus over any real or imagined quality issue, because that is their thing.
Personally, I fall into the former category. Additionally, I am a teacher, so I try to inform people of both good and bad qualities of a product so that they may make somewhat informed decisions.
Sometimes I do over-simplify things for the sake of readability (and short attention-spans) and I get called out for that.