If you search for information about data sovereignty, privacy, data portability, digital identity standards, etc then you end up with Sir Tim's initiative called Solid [1] and it's commercial arm Inrupt.
Solid received some criticism [2] around practical implementation and the difficulties of achieving widespread adoption.
Has Sir Tim's vision for Web 3.0 turned out to be a dead duck or is it a viable and practical technology that app developers are adopting?
If not Solid, then what are the best practices and technologies for building with data sovereignty and portability?
[1] https://solidproject.org/about [2] https://www.schneier.com/blog/archives/2020/02/inrupt_tim_bern.html