Reluctant to say "throw hardware at it", but I got one of the new M1 MBPs, my first Mac ever, and I can throw multi-cam 4K30 2/3 cams around with no optimized media, and it basically always runs without dropped frames, just using the H264/265 media generated by the cameras. I got the 2TB storage, because on my previous laptop I always was eating up so much space with optimized media, but it's way overkill now that I don't need that. But I didn't know that going into it.