And that's what I'm hoping for. At some point, stop upgrading my firmware with features that will bog down response time. I just hope they're not at that point yet. Although I don't remember the exact words, I simply took CR's comments to mean that not all features in v7 would be implemented on the classic Model S which should not be a surprise.
What the CR guy said (pointing at their late 2012/early 2013 Model S) was, "It's not compatible with operating system seven..."; which is open to interpretation (assumption: it's firmware version 7 he's talking about; assumption: 'not compatible with' means it won't even run v. 7). If my assumptions are wrong, or if he got bad information from someone 'close to' Tesla (and it wouldn't be the first time!) then all bets are off.