How Scaling Only Cart and Checkout on Black Friday Cut Our Marketplace Infrastructure Bill

https://xn--se-wra.com/blog/how-a-120m-distributor-cut-total-ownership-cost-35-in-year-two-with-packaged-business-capabilities-10427

After three failed marketplace projects, one sharp pull request on a Black Friday weekend taught me which parts of a platform truly need to scale. We used to spin up every service, every database replica, every cache cluster when traffic spiked