Last week's significant outage of Amazon Web Services (AWS) impacted numerous services, including the encrypted messaging app Signal, prompting criticism from figures like Elon Musk regarding Signal's dependence on major cloud providers. In response, Signal's president, Meredith Whittaker, emphasized that such reliance is not a matter of choice but rather a reflection of the concentrated power within the cloud infrastructure industry. She pointed out that only a handful of players, including AWS, Microsoft Azure, and Google Cloud, dominate this space, leaving companies like Signal with limited options to ensure reliable global service. Whittaker expressed concern that many users were unaware of Signal’s use of AWS, highlighting a broader issue of infrastructural consolidation in the tech industry. She argued that the real question should be why there are no viable alternatives to these major players, given the complexities and costs associated with building and maintaining a global communication platform. For Signal to manage millions of simultaneous communications effectively, it requires access to extensive and well-maintained cloud infrastructure, which is currently only provided by these large companies. Additionally, Whittaker clarified that while Signal utilizes AWS, it only does so partially and employs encryption to protect user conversations from being accessed by AWS. She hopes that the recent outage will serve as a critical learning opportunity, illuminating the risks associated with centralizing essential services within a few dominant cloud providers. The incident not only affected Signal but also disrupted various other major services, underscoring the fragility of relying on a concentrated cloud infrastructure.