I'm guessing whatever random extras "SolOS" grafts onto Android are probably fairly extraneous, and any vanilla AOSP-based ROM would be perfectly cromulent, provided it was possible to flash it in the first place.
For me that is where I draw the line, without drivers I won't touch it. I've wasted enough of my free time trying to get Cyanogen run on fucked up proprietary platforms.
If the drivers aren't open source, the company won't give a damn about the platform anyways because they already did not comply with the law of the license of the tools they stole (read as: linux kernel license) already.