Daniela Ryf?

As for the swim debate, for us age groupers it is clearly a time invested vs benefit question rather than anything else. As example I swim maybe 1.5h a week and I lose to top pros maybe 5 min on half distance, but 20 min in biking and run, clearly my time is better spend running and biking than swimming.

I always thought the crazy swim amounts of pro's is just the time left over once you've done all the running and biking the body can handle? Ans maybe some race dynamics reasons