Is it actually refreshing? It's actually refreshing to see Stripe staying private for so long. That means, they have a sustainable business model, and can take on projects that might benefit users in the long term despite negative short term consequences instead of focus on growing at all cost for the most part.
Sustainable business models that need insano numbers of funding rounds?
We don’t actually know if their business model is sustainable. If they were public we would have a better answer to this.