I don’t have the link, but it was on the homepage, down in the Here Are 5 Things We Tested And You Really Need to Buy! section.
I think there are probably a lot of variables involved, but for me, two stand out:
1. I’m very lightweight (not a flex - I’m also very short!) - more foam doesn’t give me any advantage that I can feel and almost always leaves me feeling inherently unstable for no good reason.
2. Loading a ton of foam into the heel and creating a rocker shape to encourage a foot to roll from heel to toe is literally the opposite of how my mechanics work - I land on the outside balls of my feet, my heels lever downward but rarely make any contact with the ground, and then roll off my toes to spring off. I have very strong feet, ankles, and calves as a lifelong dancer, and my running mechanics use that: when a shoe prevents my feet from flexing as they need to, the load ends up somewhere else and creates pain in knees, quads, hips, back, or even shoulders. And when stack heights are high, the shoes become inflexible - so it’s less that it’s tall, more that all that tallness requires a stiff, rockered motion that’s in opposition to my mechanics.
I’ve run in all sorts of different shoes and the ones that always work best for me are lower stack heights with plenty of flexibility. Even a 12mm drop Ghost back in the day was great - but it was only 17mm in the forefoot and had plenty of flexibility. Conversely, I tried one of Altra’s mega-stack shoes a while ago and though it was a 0mm drop that I’m used to, I couldn’t comfortably run in it because it was too stiff.
I used to buy into the idea of having multiple types of shoes to cycle through, but honestly? I’ve run and felt best sticking to one shoe models, or two that are very similar. I’m not breaking any records and just want to run comfortably in my later years, so I really hope I can continue to find the shoe traits that work for me going forward!