I'm not sure how important Streetview is for street level data. I was always under the impression that "paved" (or similar) streets were pretty easy to get right (and can possibly be obtained from a governmental agency?). For smaller footpaths I always assumed that they were using movement data (the same they use for traffic forecasting) to detect where they are.

They also resumed Streetview in parts of Germany this year, and I'm not sure they ever fully stopped running them for private data collection.