How many books in a saga?

When I first started writing The Silk & Steel Saga, I planned to write a trilogy. I'm the type of author who writes what I most love to read. My favorite books are big sweeping sagas with complex characters and complex plot twists set in a world full of wonder, books like Tolkien's Lord of the Rings, Frank Herbert's Dune, and George Martin's Game of Thrones. To me, as a long-time lover of fantasy, that initially meant writing a trilogy. But as I finished writing the second book, The Flame Priest, I realized there was no way the story could be told in a trilogy, so I set my sites on a five book saga. But while I was writing the 'last' book there was still too much story to be told. So I published The Knight Marshal and now it is a six book saga. I think I can finish the story in six books but I still have tons to write. If it gets too long then I will break this book in two as well, but that will finish it. I figure as long as I don't have a single boring chapter, it is okay to keep writing. And Erdhe is so big, with so many cool characters and so many interesting plot twists that I don't want to leave anything unwritten. So I hope you will agree with me that it is the quality of the story that matters, not the number of books in the saga. But I must say, I'm looking forward to typing 'The End'!