Pages and Word (in page layout view) assume that you are writing on a page of some fixed, physical size. This makes sense because they are, in essence, intended for writing print documents. You’re typing on an 11” piece of paper with an 1” margin at the bottom.
Tinderbox, DEVONthink, BBEdit, Mail.app, TextEdit, Evernote and Sublime Text are all intended for electronic notes that might have any length, and so when you approach the bottom of the window, there you are*.
* There is, in fact, quite a bit of work devoted by these programs to handling the bottom of the window. Most allow a small fixed margin at the bottom of the scrolling text. Some, seeing a return at the end of the text, may scroll up an extra line or two. Some programs — Scrivener? — offer a “typewriter” mode in which the text is scrolled up in some circumstances closer to the center of the pane.