Well, the marathon record has been broken 53 times since the early 1900s. So, there are a lot of factors at play. Better training, better nutrition, better tactics, and, yes, better shoes.

The advancements in shoes have made a measurable impact, but there are lots of optimizations being worked on.

There’s info in one of the other threads about better carb intake too.

But yeah at this point, “it’s the shoes, stupid” should defo be the main part of the conversation.