This goes against any of the main items that @jph closed with: COMPLIANCE.
So - abstracting the implementation complexity is difference than abstracting the "where data lives" - especially with Compliant requirements such as SOX and HIPAA, wtc. -- Its been a while but I've done some significant sized HIPAA and SOX, SAS70 and other compliance audits - and one of those reqs is "data retention for ~7 years" in many compliance laws... and so abstracting where data resides no beuno. (Surely you didnt mean that literally?)
I am currently working on am 10DLC compliant SMS routing platform... and so I get to dive back into compliance - and I know already I have to know where all my flows tick KPIs in a way I can visibly and empirically document life-of-a-data
And "Secure, Multi-tenant DB Routing as a Service." might be a better DNA for the tag-line.
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Also, I think I recall youre previous HN announcement for the AI scraping?
But - in conjunction with this, it would be great to have a PWA-DB that is my own RLS multi-tenant for my personal data that I own all my records and companies have to subscribe to RLS access to my PII and blacklist all databrokers and scrape for who has my PII so I can actively manage who is accessing any of it - (Using both of your AI Scraper/Crawler tool and some-version of this seems like that could be a reality)
(I love what youre doing - as other HNers said, Got to get the right CorpoSpeak bolted on here for BigBanko :-)