It does still exist, and I'd love to try it out, but I'm not throwing down thousands of dollars when it costs significantly less for me to get Visual Studio Pro as a single developer ($30 a month iirc) or you know... $120 for JetBrains IDE's annually (after 3 years) it makes no sense for me to throw down a thousand dollars (per year?) same with you Qt. I'm looking to evaluate your product and prototype and maybe build small projects that need a UI but your pricing scheme is not for people like me at all.
One would likely argue that JetBrains probably isnt a RAD IDE, but Visual Studio definitely is fully capable of RAD editing capabilities, think WinForms.