Thats a very interesting rabbit hole regarding SiFive. Its a private company so under no obligation to reveal anything. They just recently raised a series F round of about 175 million dollars which does tell us something. It means they still need money to grow and whatever revenues they currently have doesn’t allow much for further capital expenditure. Whether they have any revenues at all if of-course is a mystery. I am guessing they would not reveal and department of defence (DoD) contracts for example to preserve secracy. I am also guessing that they do have sufficient business from players who are looking to diversify past x86 and ARM for strategic reasons. Yes governments, and especially militaries like to do that.