Dropbox rewrote some infrastructure and produced 200KLOC of Go. They open sourced their common Go libraries. That's great. Some folks are saying this means they've abandoned Python. I don't read it that way. Dropbox needs to reduce costs and scale up if they want to have an IPO. Moving to Go seems like a natural choice for a company heavily invested in Python. Brad says Go gives you "90% of the ease of scripting languages with 90% of the performance of systems languages." That sounds right to me, but it makes the choice between Python and Go even more murky. I'm still searching for the dividing line.