This all comes down to an individuals risk tolerance, though right? Some people may not want to pull "peak priced power" to fill their powerwalls, even in the face of a possible PSPS. Others may not care and want to ensure their powerwalls are full.
I personally fall into the second camp. I leave stormwatch mode on, and if it activates and starts filling my powerwalls I dont care. In my specific case, however, because I am still on a tiered rate (not TOU), I dont currently have such a thing as "peak TOU power".
Once my powerwalls fill (either from solar or in stormwatch mode) and all solar goes back out to the grid, it all works out the same for me. If / when I get moved to a TOU rate, I likely would do something like
@bmah said in post #5, but like I mentioned, this all boils down to risk tolerance on powerwalls being full for a PSPS vs possibly charging during "peak TOU" time.