Allow me to put my view and notes from experience here.
@urlwolf has made a simple query "Why a programmer can not put feature X in his app A, which exist in app B made by another programmer on another platform/os/hardware etc."
From the time of DOS I could not reply to this simple question to any of my users satisfaction without being called arrogant. But now I have taken help from GOD's creation and have the answer for it.
User will ask "Why can't Notepad show bold and italics in same line as seen in Word, though both are editor and made by same company ?" The answer is "It is created that way to solve intended purpose".
GOD created hand and legs differently for different purpose. Same way notepad and word are created differently for different purpose. Notepad can not show bold/italics but Word can not load faster. If my little finger is smaller than middle one; it is intendend to be like that. At least we can rest assure that GOD did not have the resource and time problem of us programmer. HE could very easily made all figure same length and also could have added wings to our back.
My earlier Boss (fifteen years or so ago) requested me to make the invoice entry look like the actual printed invoice, on screen; as he has seen at his friends publishing house. He was referring to Ventura Publisher (PageMaker was another one), only problem was that he was expecting me to make it in his 8 bit green colour CRT in dBaseII, on which the inventory app I have made.
All these does not mean that we ignore users request. They are our existence. The technology and money was there but Nokia did not make a touch screen phone till Apple did it. Now I am a happy user of Nokia 5230 which is 1/4 of the price of iPhone and does all "what I need".
We have to listen to users and solve keeping in mind the time and money factor.
In one of my implementation, I installed IE4 at a clients site as the website I made did not work correctly in Netscape, and the client paid me for it. He wanted it to work.
So to put it happily to the demanding user, "Yes it can be done, but will take X time and Y money", but you must forsee the solution, as some users do pay for what they want.
BTW, I did made the invoice to show in graphics mode using dBaseII and GWbasic, though only preview and not the input. If any one used WordPerfect will know, it had similar feature for editing the document in text mode and previewing it graphics mode, in DOS.