By CS8, Adobe would have had over a decade of refinement. Unlike early CC versions that introduced frequent bugs with monthly updates, CS8 would have been a rock-solid, thoroughly QA-tested release. Crashes would be rare. Memory leaks would be fixed. You could work on a 2GB PSD for 10 hours without a single hiccup.
By 2018, CS8 would feel ancient compared to CC. adobe cs8