I did this with a ~2011 MacBook Air that came with a 60G hard drive. A couple of years ago I went to upgrade OSX and it turned out I didn't have enough disk space, even with minimal apps installed, so I wiped it, installed Ubuntu and ended up having 45G left over. It was a great way to extend the life of that hardware and I haven't had many issues. The only apps I'm using are terminal and a browser, though.
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