There are many parameters that make this challenging to define. What may work for some systems and file types may not work on another so we are conservative in our promotion of the one workflow for all approach. Resolve offers extremely high quality 32bit floating point processing by utilizing GPU processing but its usually the codec, resolution, bit depth, number of clips, file format, OS nuances, etc etc that dictate the potential speed bumps not the GPU side. That said, GPU ram does become an issue too when dealing with 4K and higher image sizes. These things are becoming easier to manage as GPU’s, computers and OS develop but even in our fully spec’ed Linux configs most users separate the projects into some reel structure for speed and management of projects.
Peter