I checked again and yep it says arm are risc processors.Are they not compatible with risc V ? What am I missing there? Also even if ARM went to the x86 route wouldn't they have a lot more difficulty performing as well running a different eg: (windows os)? Seems modern windows would weigh ARM down quite a bit.I'm here to learn!
RISC (Reduced Instruction Set Computer) is a design philosophy for computer instruction sets (basically the very low level instructions processors execute). ARM Holdings is a company that has created the ARM instruction set (well really several versions of said instruction set, it has been updated quite a bit over the decades) that originally followed that RISC design philosophy, though one could argue that the latest versions aren't really RISC anymore. ARM Holdings licenses out the ARM ISA (and specific CPU designs for said ISA) to a bunch of companies, including Qualcomm here. ARM Holdings is revoking Qualcomm's right to use the ARM ISA due to some contract disputes, hence the article that started this thread.
RISC-V is a different instruction set, intended to follow the RISC design ideals, and is owned by a non-profit organization. Anyone can use said instruction set for their chips without a fee. RISC-V is quite different the ARM instruction set, so no, you can't just switch over between the two. Because of this contract dispute, some people are suggesting that Qualcomm start work on RISC-V chips to avoid future issues like this.
Modern Windows does have an ARM version - you can buy laptop's using Qualcomm's Snapdragon Elite ARM chips right now (well at least until/if that ban goes through); software that has been recompiled to the ARM ISA runs quite well on those machines, software that has not been recompiled has to run through an emulator Microsoft has cooked up, and is a bit more hit & miss on if and how well it works.