Yeah, that.  I think he got a PhD for RCS and what he should have gotten is shown the door.  RCS sucks, SCCS is far, far better.<p>Just as an example, RCS could have been faster than SCCS if they had stored at the top of the file the offset to where the tip revision starts.  You read the first block, then seek past all the stuff you don&#x27;t need, start reading where the tip is.<p>But RCS doesn&#x27;t do that, it reads all the data until it gets to the tip.  Which means it is reading as much data as SCCS but only has sorta good performance for the tip.  SCCS is more compat and is as fast or faster for any rev.<p>And BK blows them both away, we lz4 compress everything which means we do less I&#x2F;O.<p>RCS sucked but had good marketing.  We&#x27;re here to say that SCCS was a better design.