You edit a file or two or more... Now you need to GO out the door. You need to leave your office, or you need to go to a mechanic (waiting room) or to a doctor (waiting room) or a plane (airport) or an office across a busy town (in a taxi cab, during rush hour) or... Are you with me so far?
What do you do?
I could connect a modified GS4 which shows up as a drive letter thereby allowing only the modified files to transfer out of the jungle of folders to GS4 a thousand times faster then if the phone is WiFi connected or even if the phone is cable connected in any way that doesn't show the phone's card as a drive letter. Because the files are few but they are inside a multi GB folder, which first needs to be analyzed, a painfully slow process over any connection that does not show the phone as a drive letter.
When you have to GO, you have no time to wait.
Taking the microSD card out is not an ideal option as I found out the hard way.
How else could you do what is most important to you, if you need to transfer only the updated files in a hurry from a multi GB folder?
That one text file you forgot you even updated.
That one pdf file you forgot you even added.
That one song you want to have access to offline.
That one picture you really need that you added and you completely forgot about...
You will remember when it's too late, unless you synced your files and it would be a thousand times slower to sync them on any modern phone.
I would be grateful if you could explain to me why I am wrong and why in second half of 2016 it's unreasonable to want to suddenly out of the blue, sync your stuff with your mobile device in seconds or minutes instead of hours. No one is going to wait for hours, when they have to GO.
Their choice is therefore to go back to Galaxy S4 or wait for hours.
And if my last statement is incorrect, please post why.