Yes, which is why I wrote System 7, not 7.0. And System 7 remains the first system Apple charged for, not counting boxed sets with manuals of System 6. So, 6 months after the Classic was released, Apple offered 6.0.8 to maintain compatibility with System 7. Since System 7 required more than 1MB RAM and a SCSI drive to run, it is unlikely many Classic users plunked down the money only 6 months later to add a very expensive hard drive and another Meg of RAM, plus they got the illusion of an upgrade with 6.0.8. A year later, Apple began charging for the System as well, adding yet another deterrent to upgrading.