ReadyBoost was once a handy feature for Windows users, allowing a flash drive or SD card to be used as additional cache storage to improve performance on machines with limited RAM.
However, the feature has been rendered largely obsolete by hardware advancements, notably the near-universal inclusion of SSDs in modern PCs and the increase in speed of system memory.
Consequently, ReadyBoost is not an option on Windows systems with SSDs, and even when it is available, the performance benefits are negligible compared to upgrades to SSD or more memory.
Furthermore, the continual write operations exerted on flash drives through ReadyBoost accelerate wear on the drives, meaning the feature can actually accelerate the destruction of the very devices it uses.
With Microsoft having phased out the feature in more recent versions of Windows, it appears likely that ReadyBoost’s days are finally numbered.