Hedge fund guy in me thinks this is all marketing. The whole XaaS picture thing looks like a nice OSI stack type of thing, but it's not how the systems work to

Hedge fund guy in me thinks this is all marketing. The whole XaaS picture thing looks like a nice OSI stack type of thing, but it's not how the systems work together (funnily enough networks don't work that way either lol). They're more like a graph, maybe a bowl of spaghetti. For instance the compliance part reaches into everywhere. You can't just write an API layer and do .complies() -> bool. Some of it even requires you to implement PTP timestamps. And it certainly reaches into reporting, where you have all sorts of strange requirements. I recently looked at a file with over 100 columns to be populated. Having said that there's plenty of use of OSS. I've rarely been anywhere that doesn't use Linux or git or various other common software. I haven't seen a lot of proprietary languages either (Delphi/Slang/Matlab).