Here's an idea for a handy performance business case calculator.
The eCommerce fashion Farfetch correlated Core Web Vitals and their own performance metrics with their business metrics, which let them identify an increase in KPIs. They built a “Performance Business Case Calculator” to drive product decisions and a performance culture.
Meanwhile, Felix Arntz discussed WordPress and performance on the WP Tavern Jukebox.
Here's Felix's talk on performance at WCEU: