I'll also say I wouldn't surprised if AMD and Intel salvage their better microcodes to form some new RISC architecture, essentially just tearing out the whole CISC layer and trimming the remaining features that existed to support that layer. I'd be nice to standardize around something, but I could also see a fight against ARM. Intel and AMD might even standardize around their own RISC architecture to fend off mobile players in the markets that they've traditionally owned. I can see Intel trying to go proprietary, but if AMD moves on RISC-V that might be enough to get Intel to circle that foundation as well. Of course they could then develop their own proprietary extensions, but hopefully they wouldn't have to. As RISC-V is supposed to be working on optional extensions like SIMD.