From the OpenBSD man page
random(4):
Quote:
All the random devices are expected to provide high quality pseudo-random output data.
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No warnings and no significant quality distinction there.
About the chance of /dev/random of blocking, I guess you could experiment a bit and see what happens on a given system. For a single-user system, at least there will be no other users purposely or accidentally draining the entropy pool, but there may be less entropy being collected too? I've had varied results with blocking on different systems and OSes. I'm not sure I can say anything definitive though.