While I’m looking forward to it, you’ll be relieved to know that if my memory serves for iPhones it’s limited to iPhone 15 and later.
Although I do wonder if the cloud computed side of the features will be for all devices. They described the features as being on device for all but the heaviest lifting.
My organization has always held back new MacOS releases until the IT team completes internal testing and validation. This is pretty typical and enterprises should be used to this.
Bugs aside, new releases may have behavioral changes and that’s true of any OS.