people have day jobs.
anyway, bmw first said don't change the atf. then they changed their mind and said do it at 100,000 miles.
there's always some risk when changing fluid at a mileage like 100,000mi thats why some places will refuse to touch it.
bottom line... the fluid isn't really lifetime, the earlier you change it the better, regular changes are good (like every 50,000mi), if you wait till 100,000 or more there is some risk although minor.
i will let you do some work and convert mi to km.