Maybe this discussion would also be interesting to freebsd-hackers or
a similar list.  We seem to be sticking to technical issues that could
increase portability of driver between the two systems. Or if not, at
least understand why not.

Just for myself, Justin: you have my blessings to repost my two
replies to him to a FreeBSD list, and cc: further discussion there, if
you think that'd be appropriate.