So if you video edit render Resolve / Premiere 4k files, PASS PASS PASS!!!  It starts at a fast 38fps on my renders, then ultimately renders at 11fps, like an old SLOW computer.  I tested it outside in the cold last night, and surprise it rendered over 1 hour project at 38fps, because the frigid air 35F kept it cold, just as it was finishing I took it back inside a normal 70F house, and as it warmed to the inside air the fps dropped back down to 11fps, because Apple did not make this thing to work more then for quick use of the i9/i7 cores.  Sad, it can do some wonderful things on the playback side of heavy lifting, but hit the cores hard for more than 5 minutes, and it ucks.  Hoping the new Silicone M1 Macs can handle the heat better