With a perpetual license, Adobe has no financial incentive to add major new features. CS8 would get bug fixes for 1-2 years, then be abandoned. You'd miss out on:
Adobe CC 2018 has been widely adopted across creative industries, including: adobe cs8
If CS8 existed, it would be a worthy upgrade for the performance improvements and Retina support. But by now (2025), even CS8 would be too old. You're better off with Affinity Suite (one-time purchase, modern features) or DaVinci Resolve (free video editing). With a perpetual license, Adobe has no financial