Disclaimer: I know this comment is not helpful for those of you who use these features. I'm just offering my perspective:
I do not use profiles
I do not use the navigation, only the map display (for entertainment, not navigation .. that's what google is for)
I do not use voice control
I do not use the 'personal' SIM card (I yanked it out and haven't missed it)
And while I do have the seat position memory set I don't really have to rely on it because I'm the only driver 99% of the time.
I do give it time to boot up upon pressing the Start button.
I don't have any issues other than the occasional idiosyncratic screen lag.
The combination of Windows IoT, JLR not exactly being a software company, and their having relatively low overall sales volumes (emphasis on overall, not just EVs) compared to the Germans, Koreans, or Japanese led me to minimize risk by turning off all features that I absolutely don't need. => Happy camper! I can enjoy the car for what it is: an amazing driving machine with beautiful physical features inside and out.