[gnicholas]

The evidence regarding comprehension using RSVP is similar to what TFA mentioned with Bionic, which was that comprehension drops as speed goes up.

The last company that tried to popularize this was Spritz, and I believe they are now owned/operated by their erstwhile VC. It probably didn't help that the proprietary bits they added were not compelling, so other companies just implemented vanilla versions and therefore didn't have to pay them anything.