I forgot I discovered this sometime within the year and it showed up again in something I watched recently. This thing might be so damn true here, but it's called the Hedonic Treadmill (or Hedonic Adaptation).
The Hedonic Treadmill is a theory that says that no matter the gains or losses that happen in life, you'll return to your set happiness. This applies to everything in life and not just shoes, but if we think about it, the chase for new shoes is exactly this. We see a new pair of shoes, we go get it, we then enjoy it, and then we get used to our life having that new pair of shoes, and then we move onto the next thing, and we repeat this over and over.
This picture below describes it pretty spot-on. This applies to
ANY sneaker we choose to go for: a pair of hype shoes, a pair of running shoes, a pair of "flashy shoes because we don't have any," and ESPECIALLY "our holy grail." This really explains why there is no true fulfillment at the end of it all; these shoes of any reason become things that are melted into our lives and therefore serve pretty much nothing.
To pretty much escape this with shoes, being able to accept what we have and practicing gratitude helps, and maybe reminding ourselves that shoes are only a tiny fraction of our lives. The whole hedonic treadmill thing applies to all of life too, by the way, and not just shoes.
There's a lot more that you can check out in these links below: