Right, making an application for everybody is always hard because it can never please everybody equally.
I mean, I could just replace 48px icons with 64px icons and call it a day! After all, everyone here has expressed personal preference for 64px icons, right?
However, this has a huge bias: only people who prefer 64px over 48px have come to share their opinion. People who prefer 48px are happy and, therefore, have no reason need to search for and find this thread here.
And honestly, I’d expect more people to be displeased by letting 48px go, because that’s the size that can fit the most icons at once. And some people really care more about how many files are shown, rather than their icon sizes.
I personally don’t have a preference. I’d just prefer to make eveybody everywhere happy at the same time. Unfortunately that’s impossible.