The whole point of SRT is to get fast read times, and optionally fast write times if you want to risk your data. It also eliminates the need to actively manage which drives your data is on (as opposed to you putting certain programs on an SSD manually) as it will actively change the cache data depending on your usage pattern. It's works incredibly well for it's intended purpose. In my own testing I could not tell the difference between day to day use on pure SSD vs SRT. It's easy to see if you benchmark it, but boot times and app launch times are essentially the same.
Look at it this way, if you are putting your windows OS on an SSD, why do you care if your KB items uninstalls are accessed quickly? Do you really care that some DLL that never gets accessed in your system32 directory is speedy? All that garbage can sit nicely untouched on your spinning disk while the stuff that you use all the time is fast.
It's the same kind of theory behind why defrag programs for spinning disks like Ultimate Defrag work well since it keeps the stuff you want accessed quickly, and the stuff you don't care about at normal speed.
