You need to stop for a second and put everything in order: Sony and MS adding RT to all their games: Yes as long as they can do 30FPS on consoles or get a sponsorship for their release on PC? What is the game they brought or they will bring to PC without partenering with anyone, where they will push heavy RT levels of performance?See your points would be valid if non sponsored games didn't add RT and sony + microsoft weren't adding rt to all their games too Remember sony have filed patents to improve their RT as well. Whilst we want to see more RT (or some of us anyway....), developers will want it more because it makes their jobs easier and quicker, yes they are having to do more work when supporting both raster and RT but as we have seen with likes of DL 2, it is just the way this is going to go with the evolution into RT only visuals i.e. raster will be phased out and if you want better/fancier lighting, shadows, reflections etc. then use the RT settings i.e. you want better visuals, buy a better gpu as has always been the case, this is no different but then developers will get **** because "zOMG, you intentionally made raster look bad because nvidia paid you to gimp raster in order to make RT look better!"
Avatar is due next year and it is RT only. These so called "tech demos" are needed because it shows other development studios what is possible and gets them interested, same with my work in development, I attend conferences where you hear/see people talking through new tools and so on that they have adopted into their products and what the benefits are etc. then it gets other companies/product teams wanting to do the same, this is just how technology/products work, if everyone was happy to stick with old methods because it just works or is what they are familiar with then we wouldn't be progressing at all, someone has to take the leap to progress.
Devs will want more because it makes their job easier and simpler. It may be true that it is easier and simpler but it is not easier or simpler when you are doing it as an addon to rasterization. And so far we don't have any examples where adding RT made the job easier for anyone. It may be true in the future. Maybe with Avatar but i have high doubts it will be RT only.
Most of what you write every time is really wishful thinking. Before you attend the conferences and listen to people, imagine yourself running a gaming company and trying to sell your product to as many people as you can. It makes sense to develop now a RT only game? With some settings that will crush Ampere/ new Radeon levels of performance? How many people will buy such a game?