Hmmm...I know CS6 is a bit older, but shouldn't a program that was top of the line for the time not scale up at least as well as any other programs?
@Richard27761516i8xw
The answer to your question is, yes, a program that's top-of-the line should have up-conversion and that's why Detail-preserving Upscale in the October release of After Effects version 12.1 (the next version after After Effects CS6) was a very popular new feature.
When After Effects version 11 CS6 was the current version, high-quality up-conversion was still very much hardware based. We'd have most likely sent clips over to a post production facility for up-conversion via a Teranex box or solution by Panasonic. Back then, those were usually done tape to tape (so DV, DVCPro, DigiBeta, or D1 would get bumped up to HD D5, HDCAM or HDCAM SR). As far as "as well as any other programs" goes, there was a very short list of software options. Apple Compressor classic had inherited software up-conversion technology from Shake, but despite being pretty good, it was not as good as a hardware up-conversion of the time. Super Scale in Resolve didn’t come until 2017 or 2018 (I think it was Resolve version 15) and the neural engine option in the paid version is more recent than that. Options like Video Topaz Video Enhance AI (probably the best software solution right now and maybe the first that’s better than hardware) wasn’t available until April 2020.
It would be great to see After Effects Detail-preserving Upscale directly in Premiere Pro, but at least it is not more than a right-click and Replace with After Effects Composition away.