The most important of those extensions will all be ratified as part of the RVA22 profile before the end of the year -- including Vector, Bitmanip, Cache control

The most important of those extensions will all be ratified as part of the RVA22 profile before the end of the year -- including Vector, Bitmanip, Cache control, Scalar crypto, and I think possibly pointer masking (a big big security thing). A number of companies will already have chips designed and ready to go using draft versions of those extensions. Any minor changes during the public review period will be able to be incorporated very quickly, with chips taping out possibly before New Year. The time to hire programmers to write the software is well before you have chips sitting in the warehouse (or sold in products), not after.