Earlier quoted context omitted.
Flash memory generally doesn't have great lifespan for repeated writes; using it as a root device is going to kill it pretty quickly. I had a similar problem once running a NAS off a USB stick; within a year of so the stick would no longer accept new data and I swapped it out for an SSD instead.
Yeah but it's also SD cards in particular and Raspberry Pis in particular.
Since then I’ve been careful to buy high quality cards, oversized them a bit, optimize the OS and apps with regards to writes (like no unnecessary logging), and paid attention to airflow. The software probably also evolved to fix the issues.