Lending library, though, only allows you to check out one book a month, and you have to have a physical Kindle device. The Kindle unlimited, it seems, allows you to use any kindle app, which is a nice change. I did just recently get a Paperwhite, so it doesn't affect me as greatly now.

I'll agree with both points. I tend to like non-fiction books more than anything. But I imagine both the lending library and Kindle Unlimited are trying to hit the greatest percentage of the population.

Ah yes, good point. You can see I don't use the lending library that much :)