Any solid reason to turn off Superfetch and Prefetch for SSD?

Microsoft or other places suggest to turn off SuperFetch if you use SSD, like this one:
http://support.microsoft.com/kb/2727880

But with SuperFetch and Prefetch:

1. There isn't any access write to SSD involve, while access read for SSD suppose to be unlimited.
2. RAM is faster than SSD.

Then, why should we turn off Superfetch?