My wife uses Libby and books go directly to her kindle.

Same. I find ebooks for my family or we use Libby. I wouldn’t know how to buy a book on my kindle if I wanted to.

I send epubs via email. I didn’t see any reference to that. Is that still going to be possible?

Do the non-kindle e-readers link to Libby? I may eventually try to get my wife and I off our kindles and she uses that when she can.

You can also get ebooks from the library

If they were trained on Twitter then probably not worse but maybe accidentally better, or most likely exactly the same

I use a hardwired button that makes a bell sound inside my house.