Associate
If it tanks performance too much then its not worth turning on. However I cant see consoles adopting it if it cant work, and the PC's of enthusiasts are far more powerful than the consoles so I think yes - the hybrid approach will be enough @DDH
Indeed, cross platform games will be developed with levels of RT RDNA2 can cope with. Not that Nvidia won't be faster, but surely AMD will offer enough performance, and of course Nvidia can work with devs to offer higher quality levels of RT. The main thing is with support now in consoles it will start becoming more widespread.