SSDs are pretty reliable, especially when compared to a spinning HDD, but they still have a finite number of rewrites they can withstand before they start to fail. This is on a cell-by-cell level, not necessarily the entire drive getting bricked after a while. SSDs store data in different ways with several different options: Single-Level Cell (SLC) or Multi-Level Cell (MLC), which can be broken down into Triple-Level Cell (TLC), and Quad-Level Cell (QLC). SLC is known to be the most durable, but also the most expensive, while QLC offers tons of storage with slightly less durability.