I don't know if Twitter is following the media's lead or if the media is following Twitter's lead. Probably both. Paying attention to neither has been a positive in my life.
Not true. Twitter switched to a default "we'll sort tweets for you" a year or two back, with a switch box to temporarily change it back to chronological sorting (this is similar to the Facebook feed). After outcry, they changed it so that it sticks with whichever sorting method you choose.
It doesn't do this for me. It automatically switches back to "top" mode if I haven't used it in several days, or seemingly whenever I'm logged out.
Edit: actually, it looks like you're wrong. Take a look at this screenshot I just took - the automatic switching back seems to be an intended feature: https://cloudflare-ipfs.com/ipfs/QmbeFHFSZW58kf8AocrZXkJRYw8...