Was 5.1.1 slower? Yes. Could it handle 4K? No. Could you edit 12 layers of 8K RAW? Absolutely not.
Premiere Pro had just completed its painful metamorphosis. Version 5.0 (the original Premiere Pro) had famously scrapped the legacy codebase from the 1990s. By the time rolled out, Adobe had squashed the show-stopping bugs of the initial release. This wasn't "new software" anymore; it was mature software. Adobe Premiere Pro Version 5.1.1
Here is the definitive feature on the software that died so that Creative Cloud could live. To understand 5.1.1, you must understand the hardware of 2004. The G5 Power Mac was king. Windows XP SP2 was the pristine, blue-tasked workhorse. FireWire 400 was the only pipeline you needed, and hard drives spun at 7,200 RPM if you were rich. Premiere Pro had just completed its painful metamorphosis