The Re-Start feature makes zero sense on a Tesla.
It makes sense on an ICE car that may have a load on it just sitting there. Leave a door open and a light on and drain it fast, or just leave it alone for months and have the low background drain kill it. There's nothing to recharge it.
On a Tesla, it charges the battery anytime it gets low, even if you haven't touched the car for months. If you really monitor it, it does it a couple times a day. The reason Tesla batteries fail is not that they get over-discharged. It's that the battery itself fails, either loosing to much capacity or catastrophically failing like a collapsed plate. If the only way they fail is a bad battery, why would you assume that the hold back for over-discharge would work, given the battery is already shot?
Have you ever once heard someone say that they jumped their Tesla and after that the battery was just fine? Nope. The onboard charger doesn't mess up and sometimes let the battery get too low. It's always running, always monitoring, and in fact doesn't even let the battery cycle that deeply.
If the DC-DC in the PCS fails the 12V isn't going to save you anyway, the car won't run with a dead PCS, unlike some cars with a dead alternator.