The subtitles for the video are great. Somewhat related, the OTCA Metapixel was also used to implement Tetris (well, an entire RISC computer and high-level language, really) in Life: https://codegolf.stackexchange.com/questions/11880/build-a-w...
[0] https://hn.algolia.com/?q=https%3A%2F%2Fcodegolf.stackexchan...
But often, there are simply many technically interesting articles you'd want to share, and I have a small history of success of submitting technically interesting articles to the homepage with no politics involved, such as tips and tricks of microcontrollers or the use of 50-ohm transmission line in RF engineering. My conclusion is that an attractive title [0] and some luck is needed. However, I tried to include the keyword "Building a RISC processor in Game of Life", but it still fails to get any votes.
My conclusion is, unfortunately, the majority of HN reader doesn't know what the Game of Life is and/or doesn't think building things in GoF is attractive.
[0] HN has a fairly strict "original title" rule to discourage clickbait, I mostly agree, but sometimes a title genuinely doesn't completely explain and provide enough context about what is in the article, which is otherwise interesting. No votes and no readers would be the result, which isn't really fair.
First hit when searching for Tetris.