Can we please talk about A6 t-belt replacement intervals again???

[Bill Rowe]

For the 98 A6 Audi owner's/maintenance manual says 90K, some of you say
60K while others say 75K.  Some say 90K for 30V and 60K for 12V.  Which
is it?  Has anyone experienced or heard of a failure before 90K?  From
what I gather, the pump goes at around 75K which causes the belt to go.
Does the pump show any warnings before it goes?  TIA