Um, the youngest of the R68s are gonna be 25 this year. They are at their mid-life. They have 15-18 years left. And how ling a car has been on a line has NOTHING to do with how old it is and when it will go. And if by upgraded, you mean GOH, that was required because without it, they would never have lasted this long.
The R211 does not have a long way. In fact, it's right on schedule in spacing between new order proposals.