I was wondering recently whether someone could conceivably start a disk-in-the-mail Netflix again, now that streaming sucks so much and every publisher seems to want their own streaming service. My understanding (possibly wrong, I'm not an expert) is that it's perfectly legal to lend out physical media without any special permission from the publisher under the first-sale doctrine, so it seems like the only way to build a library that has content from many different publishers.

(of course, this could only work as long as publishers keep producing physical media)