I think the DRM adoption is pretty much non issue to the general crowd nowaday...

Let's use a sample case... DRM in Apple's AppStore. How it seems to appeal to the general mass and can address their concern (if any) about purchasing contents online. In all of the steps, the theme is 'simple & convenient and pretty much trouble-free':

1. Acquisition: You can buy content from any of your portable devices and/or your desktop/notebook with your account.

2. Backup: The purchase is automatically synced to all of your compatible devices and also on your host computer for backup.

3. Usage: There's no serial number or repetitive online activation scheme to bother with.

4. Update: There's an auto-update system that will notify of any new version of owned/installed apps that can be accessed from any of the devices/computers.

5. Long term concerns: Apple is perceived to be big enough to sustain the current licensing scheme for the foreseeable future. The killswitch may be there, but there's no historic record of that being misused while a user is within the ToS, so...

I don't see how a customer suffer (in the popular, non-OSS encumbered term ) really.

ps: I can (and have) even shared some apps from my iPhone to people I trust (family and friends) by downloading some of my apps to their device with my account (of course I retain the password and it's not memorized by the other devices).

pps: yes, there are a boatload of other issues and limitations on apple's ecosystem, but as far as DRM-ed apps are concerned; I think they've nailed it.

ppps: this is specifically about software DRM (re: killswitch topic) tied to specific platform. I have different views about DRMs on media that can 'flow' among different platforms (pc, bigscreen tv, pmp, etc).