I think it is a pity they’ll likely never open source any of this stuff

Of course, financial institutions have a lot of “secret sauce” - such as financial models - you’d never expect them to release.

But this kind of underlying infrastructure isn’t really “secret sauce”

Well I doubt these solutions are very useful outside; from what I read what they have is a universal data store (that isn't hard to implement using current off-the-shelf OSS), something for financial instruments that has a compositional nature (you won't encounter much of that in the outside world), plus some other quirky features.

Morgan Stanley's version is open-source at https://github.com/morganstanley/optimus-cirrus , although I don't know how practical it is to actually run yourself. (They don't go quite as far as having the code itself be bitemporal and kept in the datastore, but most of the stuff in the article exists there)

> I think it is a pity they’ll likely never open source any of this stuf

The more they use cloud-hosted LLMs, the more likely it will get leaked into training data.