Huh? Binary incompatibility was lost because maemo started using eabi. Now Debian eabi is gathering steam, so Debian binaries will again be usable. Like I said, I don't find that particularly interesting myself (I bet the recent OpenEmbedded work is much more useful), but the compatibility will be there. Can you please explain what you mean in writing? I'm really bad at understanding handwaving (I was particularly lost with the "good of the community" part)