I, too, remember how this opinion was repeated as nauseam about a decade ago. It didn’t make much sense then, and even less now. Nobody today expects identical

I, too, remember how this opinion was repeated as nauseam about a decade ago. It didn’t make much sense then, and even less now. Nobody today expects identical rendering: people are used to responsive websites, native widgets etc. The problem people are actually experiencing (far less now than in the past) were more serious, such as z-axis ordering differences resulting in backgrounds obscuring content. For JavaScript, I struggle with how non-“identical behavior” would express itself, except as a blank page and a small red icon in devtools.