Why should we ever write a book with cooking recipies when tastes change over the years?
And why should we ever write any science book when our knowledge expands each year?
Or any dictionaries when languages are still living?
Or any anthology of English poetry as long as new poems are written?
Or any road map which necessarily must be a 'freeze frame' of the ever changing reality?
Roger, the implicit strong version of your argument is hardly defendable.

Wolfgang