No, Intel is not dead at all. AMD and Intel currently have 2 completely different "purpuses"
Intel such as the 9700k or 9900k are still currently the better for purely gaming and maybe even streaming.
However, AMD has more threads which is used for rendering, such as animations or video editing.
You will have higher fps with intel, but can't edit three 4k footage files simultaneously as easily as you would be able to with an AMD. Also rendering the footage at the end will be quicker with the AMD.
it doesn't mean you can't use an AMD for Gaming, you still can with only a minimal loss. However you'll be able to multitask a lot better with the AMD.