That's a very narrow definition of success. There are at least 3 areas of technical focus at a startup after you reach product/market fit: 1) ease of feature d

That's a very narrow definition of success. There are at least 3 areas of technical focus at a startup after you reach product/market fit: 1) ease of feature development 2) ease of hiring 3) ease of scale under load The author sacrificed 2, needlessly created well-known scale issue that could be avoided in 3 (basic distributed systems class), for no substantial improvement over the other options for 1. Yes, I have a bias towards startup team members factoring in their future impact on their coworkers and the company.