One of the frustrating things about being a web developer is that I can do a ton of advanced optimization to the point of code splitting my js with dynamic import() or doing page level caching, lazyloading, and splitting non-critical CSS. But other departments of my org can squash it by adding a chat plugin with a disgusting level of resource abuse which obliterates all the advances I've made.

My approach is to just explain what I can or can't do, and explain the trade-offs for everything. I'll give the decision-makers the info but I'm not going to be the curmudgeon going to war over something the marketing people say we need to survive.