I am not sure what the point is, so one application has made a different decision to another, so what?
I just wanted to demonstrate that it is possible.
wrapping lots of text is slow
I can't confirm this in FeatherPad.
[...] the Scintilla developers (and its other users) clearly subscribe to the other opinion since they went to the effort of making wrap work in background so it wouldn't freeze.
Maybe this decision was taken when computers were slow. Nowadays a computer is so powerful. But maybe I'm wrong. So, I have the intention to open a new issue at Scintilla if not a closed issue already exits to the subject. Maybe the developers will rethink them position. If I will make a comment at Scintilla, I will post here the issue number.