Comment by paul_grisham

Obviously performance matters, it's just a question of opportunity cost. The article just takes some absolute statements about performance not mattering and argues against them, which is obvious and pointless. They ignore that the benefit/cost ratio for Facebook's performance improvements is vastly different to that of the average software company with tens of employees and some SaaS CRUD app. Their own example of Uber's app rewrite due to their previous architecture not being good enough is an example against their point - they got to where they were with imperfect architecture, then later fixed it once the opportunity cost tradeoff made sense.