Is that firmware update also just replacing the 3G SIM though with a 4G one? In that case it will just fix the issue of it not being able to contact the cloud servers.
Also makes me wonder - what if someone has a subaru and lives out in a very remote area where there is no 3G or 4G service? Would that not have the same issue as the cell towers being deprecated for 3G? Seems like (specifically for Subaru owners) this might be a more common type of living situation than other car owners too!