The phrase that jumps out at me is:
> being able to cut off support for a 12 year systems would make my life much more full of joy
I think this is a nearly-poetical capturing of the core problem.
The focus is on the joy and well-being of the maintainer, not the impact to all the people who will be impacted by this change. Possibly some people rely on these devices and it adversely impact their joy and livelihood when support is ended.
This happens over and over again in tech.