Comment by numpad0

12 hours ago

They're fine for data storage, but CF card controllers for large capacity(16GB and above) had issues with severe stuttering and performance issues in random reads/writes causing OS to become unresponsive for seconds at a time if not BSoDing - no, they were not instantaneous for everything just by being flash based. There were also some problems in some SSDs that the SSDs sometimes take much longer than HDDs to complete its own firmware bootup process, so much so that BIOS might consider the disk broken. Could be those reasons.

Or it could be just that HDDs are still more economical than SSDs. About ~2x cheaper for 2.5" 1TB as of now.