I think it's important to highlight Apple's mentality: That old devices are dead to them, and the pretending that they don't even exist anymore.
I have a house full of Apple hardware and none of them get updates from Apple anymore, and I can't manually update them without hackery (OpenCore) or wiping them to install Linux (where possible). Also, because third party app developers largely align with Apple's philosophy, less and less 3rd party software even works on my computers anymore. Heck, even Homebrew, which ships open source software that has always run on my devices, relegates my hardware into their "tier 3" garbage can[1].
The combination of Apple's and third party's disinterest counts as "killed by Apple" in my book.
I have a house full of Apple hardware and none of them get updates from Apple anymore, and I can't manually update them without hackery (OpenCore) or wiping them to install Linux (where possible). Also, because third party app developers largely align with Apple's philosophy, less and less 3rd party software even works on my computers anymore. Heck, even Homebrew, which ships open source software that has always run on my devices, relegates my hardware into their "tier 3" garbage can[1].
The combination of Apple's and third party's disinterest counts as "killed by Apple" in my book.
1: https://docs.brew.sh/Support-Tiers