Yes, this is the way things should be, imho - let the company building the hardware have the say on the base OS, but then let there be forks/contributions from the wider community, which will keep the hardware alive long past the cutoff valve on the production line.

There are many good examples of this working out great for the community, one that I am playing with recently is the community firmware for the Synthstrom Deluge music production workstation, where the community is just taking it into the stratosphere in terms of capabilities beyond the original factory firmware.

There will always be folks who want to share their work.

Another good example is the pwnagotchi scene, where the project is kept alive by its users due to the open source nature of the original firmware images.