Or perhaps at that point we won't need the definition anymore. It becomes a bit arbitrary and market-y at that point. Assuming that we don't end up with a single vendor.

"My BMW still drove during the snows in February, but my neighbor's Tesla said it wouldn't drive 2 of the days." "Yah, but mine doesn't insist that the windows are perfectly clean and pristine before starting a trip!"

We probably should never have had level 5, but split L4 into a couple levels: heavily geofenced/restricted vs. relatively unlimited applicability with some restrictions.