Most of the friends I talk to that buy drm stuff buy it thinking it will be around forever. They just don't conceive of a world without iTunes or Amazon.
The battle for DRM-free video, however, is far from won. I’m not aware of any source for legal DRM-free video purchases (other than niches like stock video clips).
I only buy DRM free books on Kindle.
Many of them trade this for convenience and assume there will be an off-boarding process.
I fully believe artists deserve their share of the wealth created from their work. Unfortunately many artists' work impossible to financially support without also supporting DRM.
In all fairness, I don't know if the Foo Fighters still use DRM. It was irritating enough at the time that it became a lifelong grudge for me (same thing with Civ and any Tell Tale Games title).