Sounds like a lack of due diligence
On the part of Softbank. If all they looked at were ARM's market share in the mobile/embedded market, and didn't look into the reasons why they charge the way they do and why charging a lot more isn't an option since options like RISC-V or MIPS will take over if they do, whoever was responsible for this made a multi billion dollar mistake.
Given ARM's financials I never understood why Softbank paid the price they did, it wasn't worth even a third of what they paid. I was worried they were going to turn into a patent troll, glad that isn't on the table.
Biting the hand that feeds IT
