I think it's hard to blame BSD's (collective) loss of market share on their reluctance to add system calls, or even their pace of evolution more generally. Are

I think it's hard to blame BSD's (collective) loss of market share on their reluctance to add system calls, or even their pace of evolution more generally. Are there some specific evolutions that you think Linux adopted, and eg. FreeBSD didn't, that were/are crucial to Linux' now overwhelming dominance?