His name may not be so well known as that other, equally tragic but more high profile passing, but his influence on computing - his legacy if you will - is every bit as pervasive and wide ranging; many would say it’s more so. His impact on me personally was certainly much greater.
To this day, I still consider myself a c programmer at heart and, were my employers to allow it, I’d probably fall back on using it for performance-critical parts of any project I write. As it is, the last time I wrote c professionally was five or six years ago, but that doesn’t reduce Ritchie’s influence being felt; C may be out of favour with large, non-technology, companies, but in it’s place they use Java; a direct descendent of that language.
Gaming aside, all the computing I do, I do on operating systems based on or derived from unix. Even my mobile phone (along with a significant percentage of the smartphones in the world,) is a distant descendant of the work he did 40 years ago at Bell Labs.
Put simply, it’s impossible to imagine my life without the influence his work has had on it; c/c++/Java/other-descendent-language and unix have been inexorably entwined in my hobby and my job every day for about as long as I can remember.