There are so many other reliably low-hanging fruit for most runners that jumping to supershoes is unlikely to make nearly as much of a difference.

Like you'll see much larger gains adding 10+ miles per week to your training volume.

The supershoes mainly benefit those who've maxed out their training volume and ability to recover, and are training for professional competition instead of health or recreation.

And strength training is still severely underutilized by most endurance-focused athletes. It also improves running economy while having a host of other benefits.