It’s because the first few generations of DRM were extremely poorly implemented. My og kindle keyboard still works and will ignore the DRM (that would be locking me out of, for example, a library book after its due date) if you just change the file extension to one of the DRM free file types. It will also then let me distribute that ebook to others without restriction.

Uh, what year is it?

Any model from any major brand made in the last 10 years off craigslist?

With that kind of spec I, don’t know what you’re expecting—anything that turns on will be able to do that.

The discontinuation does not eliminate the ability to drag and drop files onto a Kindle; it simply removes a method that facilitated piracy by transferring older retail book formats via USB.

Err, what? So it’s only going to blocm certain file types?

The unfortunate, actual reason is that people will pay more markup on the vacuum with useless shit added than it costs to add it. Explaining why humans are like this is unfortunately a less tidy and much more disappointing endeavour.