Steve,Today, I received an email from Subaru that a map update was available. I installed it. At this time, since we have no trips planned, I can't say whether the update is good or bad, but it is an update.
What may be troubling, the car still shows that it is using a 2017 base map. The update that I just installed may update the road information to 2019. For example, if a new road was constructed in 2018, will it be shown with this update?
I do not know how the map versioning works between TomTom and Subaru but I just did this latest update and can confirm that changes to the interstate near me that opened last fall are indeed included in this update. I did not think to check the previous version for the same changes so I can not say if this is new for this update. I also looked at the TomTom site and their version numbers are very different so it is difficult to compare.