Like most people, I avoid the issue when possible, finding lots of good stuff to read that does not have DRM. When the book I am looking for is only available with DRM, I stick to eReader, though I don't strip it. If I cannot get it in eReader, I usually get it in paper from my local library.
As for concerns about the servers, I do re-download when I change credit cards, so all my files are are keyed to the current card -- this may sound like a pain, but it has only come up once in seven years. If the server ever goes away for good, I just need to record the card I have at that time.
The Bandit