Apart from a fairly high inter-frame time and some freezes on cam movements when testing on an old rig (1gb GPU medium-range from a decade ago and slow memory, still 8 core CPU at 2.8Ghz), it seems to work pretty well. Of course on a newer system, (an MBP from late 2019 with 4gb GPU still medium range) it works perfectly at 60FPS. But then yes, the loading time is currently a problem. Next, I guess it will depend what else is in your scene.