> Interestingly, fastmail just flipped to having an external billing system after years of maintaining their own. Would have nothing to do with your or someone

> Interestingly, fastmail just flipped to having an external billing system after years of maintaining their own. Would have nothing to do with your or someone else's decision. And Fastmail may or may not have made the right decision. It's hard to say. There are no simulators or time machines to gauge the impact anyway. The most likely answer is preference and available skillset in the area. I've seen managers that absolutely want to self build and those that never want to maintain anything as much as possible (by offloading).