RT to much effort.
Every game under the sun on PC has RT.
1. RT isn't just a thing on its own that games do or do not "have". Each problem a developer is trying to solve for (generally we're reflections, shadows, global illumination, and ambient occlusion, though the concepts has applications in audio as well and elsewhere) is its own thing. If you see that a game "has RT" and you think that means it has good graphics because RT is the newest type of stuff, check again what it's actually doing with RT.
2. Lots of PC games add RT, true. Some, because they can, because they're simple and linear and don't have a day/night cycle or other dynamic lighting approach to the design. Some, because development outlined from the beginning the choices of RT integration and it was worked into the design choices from the beginning. A few, because they did the work in a post-launch retrofit to add in the best-fitting features. And some, because RT is a selling point and so they stuck some passes in as an option even though it's not really tested or polished. (And sometimes the "fuck it, just throw something in there" solution works well enough; it's not like games these days are bug-free and perfected out of the box anyway. But it can cause problems with areas being too dark due to no "fake" light motivation, intentional glare/reflection tricks disappearing because they're no longer true to the scene, and other issues where a designer would have adjusted/corrected/"faked" the lighting if they had known it would have not worked properly via RT.)
Stray is an example of a relatively simple game (it's all the same ToD, the areas are small and the scenes are static, the camera is kind of on a rail) that the developer experimented with RT features for an ultimately abandoned-as-of-yet RTX option set in the PC version. You can kind of see some reasons maybe why in video testing it out.
The number of PC games that have ray tracing in the feature set is a lot.
The number of PC games where gamers are delighted that the RT features make the game look as good as they imagined it could be, that's a much lower number.