Everyone from independent moviemakers to small production companies would sell GH5/s to buy something similar/better from Canon, even if it's more expensive, I know that for sure.
This is absolutely true. But a smaller form factor and better video specs are required. 4K 60p in 8-bit and 4K 30p in 10-bit minimum, plus 240fps FHD and Clog with S35mm sensor. Plus it better take great photos and be a true hybrid cam.