Empower doesn't allow you to import legacy data from other sources (like Mint) or input manual transactions such as cash. The latter isn't important to me, but the former certainly is. I have 16 years of transaction data in Mint that I want to preserve.

I also think being able to self-host and export parts of your data to share with others would be great.

no

The European Commission has prepared to legislate to require interoperability, and it calls being able to use your data wherever and whenever you like “multi-homing”. (Not many other people like this term, but it describes something important – the ability for people to move easily between platforms

Now personal data exports include users session information and users location data from the community events widget. Plus, a table of contents!See progress as you process export and erasure requests through the privacy tools.

Some password managers will automatically import passwords from your browser

One mistake that we made when creating the import/export experience for Blogger was relying on one HTTP transaction for an import or an export. HTTP connections become fragile when the size of the data that you're transferring becomes large. Any interruption in that connection voids the action and can lead to incomplete exports or missing data upon import. These are extremely frustrating scenarios for users and, unfortunately, much more prevalent for power users with lots of blog data.