I make extensive use of layouts with several panes, bookmarks and, for longer files, opening multiple views into the same file and code folding. I find these tools particularly helpful when editing or reviewing sets of related files. This happens a lot for me: application code and its tests, front-end and back-end code either side of an API, code defining types/constants/interfaces and code using them, or sometimes larger numbers of related files when these kinds of pairings multiply. As long as everything stays open, ST preserves all of that display context independently for each file/view. Closing and reopening would lose that context every time.