Softbank aren't really doing this any more though. They are making very large bets on relatively few companies. Their vision fund 1 was something like 100 billion spread between about 100 companies, so 1 billion each. This is rather different than the usual VC. It's hard to get data, but most data suggest smaller rounds have better success [1].

[1]: https://carta.com/uk/en/data/vc-fund-size-performance-2024/