Actually I think 100G is not that much, if you consider what you get. Furthermore some time ago I estimated that you could store the entire world's tiles (raster data in 10m resolution) and OSM data on a SSD (<500G).

If you think about it, that might be a game changer. Maybe it might make sense to ship e.g. smart phones with wikipedia, OSM and satellite photo (e.g. Sentinel-2 is free data) on disk.

Granted, 10m resolution is not the state-of-the-art in aerial imagery - which is around ~0.1m (this means 10^4 times more data) - but it is reasonable to detect buildings and combined with OSM's vector data you have practically Google Maps in your pocket.