In case someone goes looking for the source for that citation, it's on slide/page 37. It further cites another web page which no longer exists but is available at the Internet Archive: https://web.archive.org/web/20150906010133/http://www.aerosp...

Both pages are focused on aerospace engineering (and perhaps fault-tolerant systems in general), so I'm not sure how I'd rate them as authoritative sources for the lifespan of electronics in general. Possible faults in a gaming GPU might not be as critical if they cause something to fail once a year, for example.