http://devblog.avdi.org/2014/04/02/why-does-amazon-hate-eboo...
I've yet to run into a problem sending all sorts of files, ebook or otherwise (aside from epub), to my Kindle.
That article seems to overstate issues with generating files readable on Kindle.
(Do modern Kindle readers not include browsers? I've never looked on mine.)
I'd be a lot happier if everyone went to no-DRM or at least interchangeable DRM so you could move to a different e-reader. Amazon and iBooks are the odd ones out. iBooks doesn't have a big marketshare, but Amazon definitely does.
I personally go to bookstores to find books and authors that I've never heard of before---something that is actually quite hard to do online.