In the linux world:
Ubuntu does the same thing, but at least each release is in alphabetical order.
Debian doesn't change often enough to get confusing.
ArchLinux only has the one version, but they provide incremental updates ~dozen times a day. Running old snapshots is not an option, not that there is any fathomable reason to do so.
Windows:
Pretty dysfunctional too, if you count four separate naming schemes, the first and last could be thought of as one with interruptions, one of which used names instead of numbers, parallel versions, etc...
Granted most of that is long-ago history, and much more
popular (read -- we know it anyway from sheer repetition) history.
All the current versions are easy to remember, you only need to keep track of two names.
But I am pretty sure there are plenty of people who use OSX a lot who can tell you which is which -- they've learned the order.
