There's a lot of open source projects, most of them fail. I don't think the availability of an OSS ISA is good enough to overcome the friction of adopting a bra

There's a lot of open source projects, most of them fail. I don't think the availability of an OSS ISA is good enough to overcome the friction of adopting a brand new technology, unless it enables something that competitors don't. And it doesn't seem to do that w.r.t ARM (so far).