I don't get it.
Why does it require more than the current approach in panasonic or LG or Samsung?
It doesn't, but Tesla isn't building their pilot cell line in an existing Panasonic, LG, or Samsung factory. Their Kato road facility isn't big enough to do 10GWh/year with the wet electrode process.
And really why bother, the DBE process already works, just with low yield. They aren't going to stop working on it and replace it with the outdated wet electrode process.