It's certainly not obsolete what with both guns and ammo in production.
It's a good cartridge for heavy bullets and I use the 220gr A-Frame for elk in situations where I expect there may be bear interest in my kill. The BC on the A-Frame is not great, but there's enough powder in the WSM case that it's reasonable. The load is Retumbo loaded to 2820 in a Kimber Classic.
One other thing I like is that 66.4gr of RL-25 with a 220gr game king second is an 1/2 MOA and dirt cheap softball load at about 2450 ft/s. Just throw out the seconds that are obviously mangled. A great load for stuff that doesn't require much reach when you want to avoid meat damage. Also a fun load to introduce newer shooters to light weight hunting rifles.
Other than the .338 RCM and various wildcats, there's really not much out there like the .325 WSM. If it didn't exist, we'd have to invent it or something very similar.
