Because getting something into production is much more than just the specification. You can specify anything. But producing hardware that complies with that sp

Because getting something into production is much more than just the specification. You can specify anything. But producing hardware that complies with that spec is much harder. Then you've done a lot of research and development, so you have to sell it in a way that is backwards compatible, so you have to wrangle a whole group of organizations (foundries, chip designers, customers) who each have their own product lifecycles to think about. Intel might be ready, but Apple is delaying their release, etc.