I guess it betrays my ignorance, but... is it possible to use/install proprietary/closed-source apps from the original N900 OS on Leste? Possibly to ensure functionality that currently is not available on Leste? Not "officially" I guess, but by manually adding the (which?) sources to apt? And if yes, would these apps be installable & fully compatible with Maemo Leste? And what about the huge catalogue of opensource apps that exists for the Maemo/MeeGo platform? Openrepos etc.?
I'm not so sure. On one hand, there is ti-omap3-sgx-dev. On the other, dev packages should not contain any .so files. These may have been just symlinks, but I won't be able to check it right now. It would be worth checking if devuan still includes .so files in the newer versions or in backports.
Could we possibly use Gnome Shell instead of hildon? (this may require too much RAM for N900, but possibly for F(x)tec Pro1...?