Hello there! I was wondering: if you have the opportunity to build an enterprise platform with a dedicated team, and you would like to obtain end-user data to base your first attempt, what question(s) would you start with? Or what insights do you consider essential to obtain to build your platform?

That depends on what you want to achieve with your platform. Typically though I’m interested in at least the DORA metrics: https://cloud.google.com/blog/products/devops-sre/using-the-four-keys-to-measure-your-devops-performance

I've asked for teams to provide a description of their workflows for common development activities (feature development, debugging, issue resolution). I also ask what tools they use, and what they wish they could use. Finally I ask the magic wand question: “what one thing would you change if you could wave a magic wand?” All those give me a ton of material to refer back to when doing vision and roadmap work.