How the fuck are Class A-only extinguishers still a thing?

Also Class B & C-only ones.

I mean COME ON. Dry chem isn't that much more expensive and it needs inspection just like the others... and it's the same cost for the inspection...

@Elizafox
A-only can go take a hike. Seriously.

(We kept B&C-only extinguishers at my last job because dry chem extinguishers will basically FUCK UP all the surrounding equipment with the mess.)