The reason you don't see long term support on Android is because of Qualcomm. Qualcomm wants manufacturers to build on new chips, so they deprecate older chips and stop support. Most manufacturers don't want to hire kernel and hardware devs.
Samsung can pull off longer support because of Exynos and they have a lot of inhouse expertise to extend support on old Qualcomm chips.
It's all money. They don't want you keeping a phone for 5 years.
Apple can do it because they lock you into their walled garden where they can double and triple dip on getting your money.
The reason you don't see long term support on Android is because of Qualcomm. Qualcomm wants manufacturers to build on new chips, so they deprecate older chips and stop support. Most manufacturers don't want to hire kernel and hardware devs.
Samsung can pull off longer support because of Exynos and they have a lot of inhouse expertise to extend support on old Qualcomm chips.
It's all money. They don't want you keeping a phone for 5 years.
Apple can do it because they lock you into their walled garden where they can double and triple dip on getting your money.
They also build their own chips.