I don't like the look of AmigaOS3.9.
I hated the reset that Fusion/Shapeshifter did in order to reserve a
particular memory address and I hear that AmigaOS3.9 does the same -
you boot and it resets, then you boot again.
When I switch on the power button I like to boot and get to work
within 30 seconds.
I also hear it substantially delays boot time for SCSI users by taking
ages to wait for an IDE drive on the internal scsi.device.
CD32 users with SX-1/SX32 expansions seem to have a lot of trouble
with OS3.9 too...
:-(