Absolutely relevant when talking about a gaming card for gamers, unless you think people who design games engines and games graphics aren't relevant.
Stop pretending this was mean-old nvidia trying to force it on an unwilling world - it's been a future technology direction for a long time and a well known and wanted technique for lighting, reflection and just plain better rendering for many years. Hell, my graphics professor was talking about it in a wistful "one day!" kinda way in 1998...
Whether you personally value it is what's irrelevant.
It absolutely was nVidia pushing this onto the market.
I don't care if it was someone's pet science project in the 60s. And yes, I'm aware we've had software RT for decades. It's irrelevant to gaming and consumer gaming cards. The decision to push RT on consumer cards was purely a business strategy decision.
1. Even the 3080 isn't capable of doing real-time RT without either killing FPS or killing details (lol at "better-than-native" upscaling).
2. For nVidia, this is a *very good thing indeed*. They can easily sell new gens of cards by showing a 100%-200% improvement in RT. Those numbers will look much more impressive than +30% rasterization perf per gen. Marketing win.
3. nVidia wanted to find something other than rasterization improvements to keep selling new cards. Same deal as TV makers always looking for some new gimmick to sell TVs ("ooh 3D, shiny!")
4. They also wanted to be first and hence have something that AMD could not match for a few generations. Crippling your competition is a marketing win.
5. Lastly, they had all these Tensor cores from their AI-focused architectures, and these were an ideal solution to the points above.
Real-time RT might be the (somewhat distant) future. It's not hear yet - you have to cripple your FPS or accept inferior image quality right now.
The decision to push RT with the 2000 series was a pure business decision. And it WAS pushed on gamers. Whether your graphics professor was talking about RT years ago is (again) irrelevant, I'm afraid.