Granted, they learned about the specs to publish along the lines of the rest of the industry(hp) or stop publishing a spec at all (battery capacity on Model3, so you don't end up with advertised 85KWh battery which is only 81.5KWh total, 77KWh usable, when brand new - like all Model S with 85 batteries). That said, historically they did offer one hardware retrofit, ludicrous upgrade for P85D, and even though it costed $5,000 and there orders of magnitude less candidates than FSD (remember that Model 3 has FSD and they are pumping them out by the thousands per week), it took forever (over a year to get it scheduled and done). I am still waiting for a $500 MSRP wall charger from my March awards. So, retrofitting a couple of hundred thousand cars or more will take forever plus - Tesla sucks at logistics when it comes to things which don't generate profit. If the upgrade will require new sensors, it will take even longer to even figure out how to ass those little wipers on cameras, or radars for BSM. And I've said nothing yet about the per car cost multiplied by hundreds of thousands of cars, which Tesla may simply not be able to afford.
Btw, do you think Tesla will retrofit AP1 cars with side cameras to provide a more reliable BSM (something which was officially in the AP1 specifications, so I could argue they should deliver)? Of course not, and that would be so many less cars to retrofit