I work for a company that optimizes page load times via a js library. We target mainly e-commerce. It’s crazy to learn how much money e-commerce will spend to improve website speed knowing it has a lift on their conversion rate.

With googles page speed insights / lighthouse gaining popularity (mainly just because its google and not much else), there is definitely opportunity to focus on just improving those results and be paid very well.

the load/onload/document complete event is very mature with studies correlating conversion rate. I don’t believe googles “web vitals” have been tied to any meaningful business metrics... yet.