Do you worry/care that this is all done on the net and your voice is probably stored/integrated into the system?
On Windows, no telemetry is stopped by default. Shocking, I know. Haha.
It's only when you run registry/powershell tweaks that you can begin to block telemetry of your usage being sent to Microsoft.
I personally use ShutUp10++ (
link) for Windows10/11. Just hit 'actions' then 'apply recommended' and restart computer... now Microsoft telemetry information (and other tweaks) are disabled.
Another way of blocking various telemetry apps on Windows, is to use AdGuard for Windows (see my
guide on how to purchase), with DNS-based system wide blocking, which will block various ad-related domains, that Microsoft typically uses.
Both of these strategies will give you some kind of piece of mind with privacy in mind, when it comes to Windows.
By default, Windows 10/11 is a telemetry nightmare. Windows 7, on the other hand, was 100x less privacy invading. But, I digress.
I mentioned Rewind for Windows, which will be on-device processing (hence considered private), much like an iOS device without an internet connection.
For iOS for example, you can talk to Siri without an internet connection now, since audio is processed by the processor on device.
As long as you have iPhones and iPads with its A12 Bionic chip or later.