What happens when I am writing a query and realize that I will actually need another table or query underneath it?  I can't save the query I am working on until I create the underlying table or query.  Which means I have to leave my work unsaved while I do that.  I would prefer to be able to save my query even though I know that it won't work right away.

Another situation: I need to change a column name in an underlying query table.  I can't do that b/c another query or report depends on it.  So I go to the query that depends on it to update the column name.  But of course I can't save that b/c the underlying query hasn't been updated with new column name.  I'm trapped!

All in all, I think I should be able to save whenever I want to, even if it's invalid.  Warn me, but don't block it.