FireWire? That would have been a good addition to the article. Hopefully that will allow older FireWire devices to be used with a USB-C-to-Firewire adapter.
A cursory google search did not reveal any USB-C to FireWire adapters; there are Thunderbolt 3 to 2 adapters (Thunderbolt 3 is basically USB-C version of Thunderbolt 2 which is Mini DisplayPort) and there are Thunderbolt 2 to FireWire adapters, so that combo may work
Using a TB3 -> TB2 adapter and a TB2 -> FW800 adapter definitely works on Apple hardware with every FireWire device I've tested (hard drives, cameras, and audio gear)