My expectation is that most desktop users will rarely or never experience a situation where there's a noticeable difference between a fast SSD and a cheap SSD. Storage benchmarks are a lot more sensitive than end-user perceptions of the overall system's responsiveness. Even power users will spend most of their time either not waiting on the storage, or waiting on a storage access pattern that is only moderately faster for a high-end drive. But the metrics that truly matter—responsiveness as perceived by the human user—are also the hardest to accurately measure.

Today's entry-level SSDs are faster in pretty much every way than the top of the line from ten years ago. They're definitely "good enough" for most users.