Agree with your points generally, but other networking hw vendors
have dealt with this since SFP variant and other modules arrived on
the scene.

It seems like there is interest now in consolidating this, in the same
way that copper PHYs got consolidated. Yes, there are some MAC drivers
which still have there own PHY drivers, but most Ethernet MAC drivers
use phylib.

Now maybe the time for an sfplib.

    Andrew