So far they have only upgraded the posts to V4. And the main point of that was longer cables that allow them to reach the charge port on almost any EV.I get your point but then why Tesla is trying to update it to V4?
They are also rated for higher voltages, to be compatible with possible future updates to the charging cabinets. (I'm pretty sure the Cybertruck will have an 800v HV system, but it will likely have the onboard electronics to allow it to continue to use 400v chargers, just like every current 800v EV on the market.)