I'm trying modded BIOS 1902 and it appears to work fine for me.
I've got some big RAID so I was hoping for even minor performance gains, but so far no noticeable improvements in performance or benchmark scores. But at least my OS doesn't need to load and run that stupid Realtek garbage at boot time.
It appears stable, but 1701 was already fully stable for me so there's really not much room for improvement (and a lot of room for it to break something which worked flawlessly on 1701). I haven't run my usual 24-hour uninterrupted unattended stress-tests yet.
1902 did break my RAID, but this was expected so only a minor waste of time rebuilding and restoring from pre-update backup images. I'm a little unhappy that my 1902 RAID configuration won't run at all on 1701, I can't boot the 1701 segment on my Dual-BIOS without (again) rebuilding the RAIDs for version compliance, so if I stay with 1902 I'll be locked into 1902 without a redundant rollback.
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[/Korth]