Thinking companies like: Amazon AliExpress, eBay, etsy, Flipkart, Groupon, Rakuten, TaoBao, Walmart, Wayfair, etc.
Trying to understand if Modals are considered "Good UX" by collecting data on what the biggest e-commerce companies - who have the most to lose in terms of conversion - do when it comes to UX in practice.
Not looking for a theoretical answer/discussion, but rather to understand if anyone has seen a Modal in practice on a major e-commerce site during checkout.
Thanks!