There were two changes in the "Softbank model" -- first was investing at this scale without a real network effect or any sort of "moat," and the other was just the sheer speed of the investment -- an avalanche instead of a snowball. A company like WeWork doesn't have any real reason that it needs to grow hyper-fast -- it's a Ben and Jerry's.
https://www.joelonsoftware.com/2000/05/12/strategy-letter-i-...