After a deadline has passed, it will no longer be possible to load new e-books onto the affected Kindle models, effectively turning them into paperweights. - this is absolute nonsense, you've always been able to download books into kindle off your computer, via regular usb cable. Yes, it's a (minor) pain to have to convert them into this stupid, closed azw3 format, but callibre does that in little time.
Amazon is ending support for numerous Kindle e-readers and Kindle Fire tablets in May. After a deadline has passed, it will no longer be possible to load new e-books onto the affected Kindle models, effectively turning them into paperweights.