I think Russ was joking, but accessing a WORM jukebox via ATA would
presumably require ATAPI, to get access to the SCSI CCS or MMC command
set, whatever it's called (the one that controls jukeboxes).  I've
never heard of an ATA(PI) WORM jukebox and it wouldn't help with
existing SCSI WORM jukeboxes, such as mine.

In any event, SCSI, ATA and AoE should all be able to coexist in one
kernel.