What I've read they burned a lot of money and hat large problems scaling nevertheless. Which I don't find too surprising, not because they are unable, but because it isn't easy to scale.

From my experience and from what I read scaling people roughly a power of ten is a larger change in an organisation and therefor likely a challenge. For _any_ technical process the boundaries might not be strictly a power of ten but i would say that scaling a power of a hundred is a challenge if this value is not already reached on any process in your organisation.