When incremental gains are no longer worthwhile, institutions will no longer invest in the infrastructure. As long as the profit gained > costs, they will inve

When incremental gains are no longer worthwhile, institutions will no longer invest in the infrastructure. As long as the profit gained > costs, they will invest in infrastructure, to the benefit of the tech industry. And you're right, we don't need market makers trading as fast or as frequently as they do, but they see an opportunity, so they go for it, and we benefit anyway. I'd personally be happy with 10 second execution, but if I can get 1/2 second execution, why would I complain?