I suppose milage varies; I don't like that the system reorders my partitions.
I'd be much happier if, say, sd0x (literal) meant the whole disk, and sd0a
was the first partition, according to, say, all other disk partitioning
software, and sd0b was the second.   Currently, for historical reasons, my
fifth partition is sd0a, and my fourth is sd0b.  I consider that a special
case.

I don't see why* root should be moved into sd0a by default; I don't quite
grok how the kernel does this.

My objection to the numbering from zero is based on the Principle of Least
Surprise; altering one device should not immediately change another.  Removing
the disk I normally mount /scratch from should not cause my system to get
confused trying to find a nonexistant sd2b for swap.

-s