That's technically true but not true in real life for most people. Yes, you can ignore the notice for awhile but fairly soon you'll reach the point where something like iTunes requires a newer release or you need to upgrade iOS/Android because an app developer made the business decision that using a new API offers more benefits than supporting legacy devices.
There are two reasons why this works out better. One is that the non-Microsoft world isn't dominated by enterprise IT departments demanding binary compatibility with antique code; the second is that those platforms have spent many years building trust that major upgrades won't prevent you from working. In the case of Windows, that was complicated by charging for updates and the broken IT culture which resisted them amplified with the rough Windows Vista release cycle causing many people to avoid it for a decade.
There are two reasons why this works out better. One is that the non-Microsoft world isn't dominated by enterprise IT departments demanding binary compatibility with antique code; the second is that those platforms have spent many years building trust that major upgrades won't prevent you from working. In the case of Windows, that was complicated by charging for updates and the broken IT culture which resisted them amplified with the rough Windows Vista release cycle causing many people to avoid it for a decade.