For most of the cars on the road today brake spring pliers are obsolete.They were designed in an age of rear wheel drive.
Then you'll be glad to know there's still a class of vehicles that is rear wheel drive primarily and many still use rear drums:
trucks. According to Chevy's website they still use rear drums on the '11 Silverado. GM went back to rear drums in '05 after trying rear discs before that. And of course GM has never really figured out how to build discs while successfully and reliably incorporating a parking brake, eg Eldorados.
In the past three mos alone between my vehicles and friends I've serviced rear drums on an '87 F150, '98 Ram, '02 Ram 2500 (drum in hat = DIH). Also had to do the rear discs on my '02 Silverado because true to GM form the caliper hangs up on the slider pins causing pre-mature wear - and the parking brake doesn't work but at least it doesn't use springs 'cause instead it uses the abortion of a split-ring shoe.
I won't touch on OTR trucks that use drums because of the considerable increase in swept area over discs.
Furthermore we know that drums are not obsolete to the original poster since he's currently working on them.
And to the OP: if you've got an O'Reilly nearby the Powerbuilt brake spring pliers have a couple photos on the back of the packaging that are actually very helpful. I love using brake spring pliers over vise grips and screwdrivers.