Nothing iOS 17.4 brings is mandatory. Outside the EU nothing is changing. Inside the EU you have more choice. Period.I'm more than a little curious to learn how the meddling EU megalomaniacs intend to handle a likely increasing number of users who don't update to iOS 17.4. Forced software updates for the greater good? Respondents to this post can scoff all they like but I'd opine in advance that such posters have probably been asleep at the wheel of life for a minimum of four years.
Impact on people not willing to upgrade = zero.