> i. GUIs moving to browsers and a lot of compute moving to runtime based languages like Python/JS means that any new ISA features are initially hard to utilize in killer apps on the client side. So if Intel ships a killer new set of instructions there is a significant lag between it doing something useful for the user.

I’d argue that the deployment of new native code has never been easier, because it will be the browsers that first make use of new instructions, and they have large sophisticated dev teams who push out frequent releases with minimal user effort to adopt.