[sofixa]

The press coverage you linked contradicts you. It says that TKMS' bid is too risky because it requires doubling the size of their existing design, which is risky.

Furthermore, it's entirely on Australia to choose the best bid. If they thought TKMS' bid is risky to upscale, they should also have thought DCNS/Naval Group's bid is also risky due to having to redesign and chosen the Japanese design which was the closest to what they wanted. Considering the fiasco that was their precious submarine acquisition, it's not surprising it failed again.

I don't know what they're going to do while waiting for the new subs to come in the 2050s, the Collins-class isn't supposed to last that long.