Or just stop making pointless UI changes. But that's not really the point.
Right now most Android devices come with a custom Linux kernel, and you can't just use the vanilla kernel instead because it doesn't have the drivers for the hardware. Which means that when the OEM stops supporting the custom kernel and it has vulnerabilities in it, you can't replace it with anything on that hardware, so your choices are to stay vulnerable or throw away the hardware.
If they'd spend a minimum effort to get their drivers into the mainline kernel tree, the hardware would work with any version of the kernel without needing special support from the OEM, so then it would keep working with new third party kernels indefinitely -- even if the OEM goes out of business.
But reviewers don't distinguish between the devices that have this and the ones that don't, and don't tell consumers why it's important, so consumers buy devices as if it doesn't matter, when it does.
Right now most Android devices come with a custom Linux kernel, and you can't just use the vanilla kernel instead because it doesn't have the drivers for the hardware. Which means that when the OEM stops supporting the custom kernel and it has vulnerabilities in it, you can't replace it with anything on that hardware, so your choices are to stay vulnerable or throw away the hardware.
If they'd spend a minimum effort to get their drivers into the mainline kernel tree, the hardware would work with any version of the kernel without needing special support from the OEM, so then it would keep working with new third party kernels indefinitely -- even if the OEM goes out of business.
But reviewers don't distinguish between the devices that have this and the ones that don't, and don't tell consumers why it's important, so consumers buy devices as if it doesn't matter, when it does.