[bradlys]

Simplistic messaging apps aren’t really a good model to run off of. Designing WhatsApp and Instagram are common system design questions because they’re trivial in comparison to design Uber/Lyft, etc.

[DeathArrow]

Even Waze isn't complex enough to compare with Uber. Waze has to process real time data but doesn't have to deal with processing payments and complying to regulations worldwide.

[CaptainZapp]

Could it be that introducing compliance at a later stage in development is just that much more expensive?

That's after shitting on compliance for years as part of your business model.