iPhone 4 is 8 years old so not sure I see your point.
This thread started with a comment about mobile phones in general being locked down to a specific kernel/os/software-combo, and that the upgrade paths is at the mercy of the vendor (unlike PCs).
Both Apple and Android phones are locked down. Who does it in the most convenient way is irellevant to the argument made.
The OP's comment was that any mobile devices these days, both Android and iOS are locked down black boxes. It wasn't specifically criticizing just Apple.
But it's easier to flag people as fanboys. <shrugs>
Since you are having trouble with getting what I said: I am saying that Apple in my eyes is the lesser evil of only two options. It's a very practical and time-saving decision to use Apple tech. But call it fanboyism if you like.
Are you new here?