Please don't take me as speaking for what happens with the Raspiblitz project. I am an open-source contributor in my free-time and simply deciding what to work on by it being useful for me or not.

There have been no PRs offering patches for Core (which would still need to be reviewed and tested).

The dependence on any of these projects is concerning in itself and I think if someone not able to build Bitcoin Core from source is likely not aware of the implications either.

BTW the Raspiblitz - close to bare metal - way makes the easiest to make such modifications yourself, but as discussed above to have the supermajority of the node network run some patch is not that straightforward and in my opinion not easier than coming up with a new data structure for data storage.