Reminds me of the "semantic web". Making content machine-readable has positive side effects. (clear structure, reduced ambiguity, separation of data and presentation)
It's another example where the reason for better engineering is to make machines (search engines) happy.
"Google-free" FOSS Android-builds (Graphene, /e/, iodé) are available today and usable for most tasks. Just make sure your government IDs and banking apps don't depend on proprietary Google-only features.
The dependency is much weaker in this case. Finding somebody else to manage/host Nextcloud is easy while using MS Office without Microsoft is impossible.