Dennis Ritchie invented the “C” programming language, so a second round of honors comes as no surprise. Although five years ago he passed away, some confusion over a tweet started the social media avalanche known as “second death syndrome”. The problem, especially if you look at it from Ritchie’s perspective, is that he’s been dead for five years — exactly five years. That time gap seems to have escaped some of the biggest names in tech, including Google CEO Sundar Pichai, who late Wednesday tweeted out Wired’s five-year-old obituary on Ritchie

Tech luminaries laud Dennis Ritchie … 5 years after death
https://www.cnet.com/news/tech-luminaries-laud-dennis-ritchie-5-years-after-death-second-death-syndrome/

Well-known tech figures appear to have forgotten the father of the C programming language died years ago, falling victim to social media’s “second death syndrome.”