I can provide a bit more detail.
FW v19 has nothing to do with the announcement. There are no FW range reductions on existing bikes.
The 22MY is a new battery and premium bikes get a boost for the same price.
The SR is now based on the FST platform, and costs less. With the exception of charging, it can be upgraded to the performance of an SRF for roughly the price differential between the two models.
Zero has allowed owners to eat a bit into the buffer on the new battery at the cost of longevity on repeated use and charge for increased warranty cost(warranty is the same as before regardless of this feature)
There is a new charger, which operates on the same principle as the battery. Charge rate can be increased at the cost of slightly increased wear(no warranty change)
Older bikes can increase charging slightly due to performance testing and improvements, at the cost of slightly increased wear.
Other things like On Dash Nav and Parking mode require a dealer trip to update FW, but are available.
Now there are software differences between an SR, standard SRS and premium SRS. Zero probably saves money on sourcing and manufacturing,. Not in love with the concept, but I wonder if people would be as upset if they didn't offer the ability to upgrade but used the same hardware.