@tante I can't imagine ever being done with software I actually use in day-to-day life. I will always spot something that can be better or smoother or some additional functionality that would make it more useful. (This is, of course, a big "if" - talking about software "for me".)
In software in the public/open source/product sphere, I imagine there will always be feature requests from the userbase as well. If something comes in that is worthwhile (and truly additive to the value of the software)... why ignore it?