Great project and a shame Apple doesn’t support their desktop Macs for a longer time. They never had a great track record when it comes to macOS support but I’m pretty sure that the move to Apple Silicon makes them want to get rid of every Intel Mac as fast as possible.Not even supporting the 2017 officially with their latest OS is a joke honestly (you need the 2019 model at least). I just hope they don’t abandon M1 Macs as fast.
Officially supporting 16 year old Macs probably isn’t necessary, but supporting your (expensive) computers for at least a decade should be a no-brainer, Apple!