Sukha Soma Group

Quick question for the mechanically inclined folks on here because I'm getting conflicting info from every direction I look. My 2016 A6 has the ZF 8 speed and just crossed 120,000 kilometers, and the owner's manual says the transmission fluid is filled for life and doesn't need changing. Something about that just doesn't sit right with me, like how can any oil last forever especially in this heat and stop and go traffic we deal with daily. Called the dealer in Abu Dhabi and even they seemed unsure, one service advisor said leave it alone and another quietly told me they do recommend changing it at around 100k even though Audi officially says it's unnecessary. ZF themselves apparently recommend a fluid and filter change at 80,000 to 120,000 kilometers so why would Audi contradict the actual manufacturer of the gearbox? I'm leaning toward just getting it done somewhere that knows Audi transmission repair properly rather than risk it, but I've also heard horror stories about transmissions starting to slip right after a fluid change if it's been left too long. Anyone actually done a fluid change on a higher mileage ZF8 and what was the outcome?