The important point is that using your experiences as a know-how to share and spread as a solution (package) to extend all of Macbooks life in this case.
In reality, how many people would bother to use the older Macbooks as a main computer without software update? How many people would try to replace the battery, broken screen, or install the SSD without software update?
Then let them know, how we can achieve this effectively? This is what we actually need? This solution encourages the users to extend the devices.
I am not sure how you guys feel, but it is very important for me to let people actually use the existing device longer, NOT AFTER REPLACEING IT as a second device.
As now you would agree with the fact that 2009 Macbook with an SSD and Mojave would offer seriously better user experiences than the latest hyper inflated brand new Mac (as well as Surface Pro? ) with less responsive keyboard.
Every Macbook users who came to Restart parties deserve to get informed. I would send the mail shot to every Mac users within the mailing list.
Also, any software reverse engineering /modification should be protected within the legal framework. (Hello “Right to Repair”) I am happy to accept huge concession that the legal framework supports only after the OEM software supports ends. Once the OEM ends software support for the specific devices, then the users should be able to do anything to extend the device legally. Otherwise, everything would be pie in the sky.