Java on Prem Instead of Cloud

I saw this impressive data from Stack Exchange(https://stackexchange.com/performance) about their Self Hosting infrastructure. I know they're an outlier for their size of company, but I wonder if there are similarly sized companies or even smaller tech companies that do not rely on the cloud and share as much data about their hardware infrastructure and self hosting data. Particularly those using Java on the backend. Could be using Spring Boot or Quarkus or whatever framework. I primarily use Spring Boot at work and I like it.