I fail to see how this is quitting the tech industry. This is quitting Yelp, but the listing of the Patreon account is all "tech industry" work, just without having a boss or company to be accountable to. The post doesn't seem to insinuate that the author will quit writing software - "Eventually it would be nice to make a thing that actually makes money on its own." Someone who codes and makes money off that product is still in the industry, no?

The author isn't quitting the industry. He is basically going independent, with an undetermined business model.