The most recent novel in Del Rey’s post-2014 continuity reveals the fate of a particular prequel character. You can go look it up if you want. I haven’t read the book and don’t intend to. In any case, I suppose it is funny that it’s “canon” this particular character survived as long as he did, past the OT era, though I’ve noticed some complaints as to where this character ended up. All my humble opinion is that if it’s in a book, it just doesn’t matter. For now the movies can’t contradict this storyline but you have to remember, a company owns Star Wars now and what’s canon today outside of Lucas’s six movies may not be “canon” tomorrow. Since 1977, Lucasfilm has deep-sixed at least two tracks of outside-the-movies canon. The whole Marvel run from 1977 to 1986 was declared apocrypha. “Splinter of the Mind’s Eye” is apocrypha. The Brian Daley Han Solo books are apocrypha. So are the L. Neil What’s His Name Lando Calrissian books. I don’t even think “The Star Wars Holiday Special” was ever “canon.” Those crazy kids’ books with Trioculus, Han’s floating house and the Space Pirate Boogie, Mount Yoda, and Ken The Fresh Jedi Prince of Bel Air? Not canon either, even if they started after the second wave of “canon” that arrived with “Heir To The Empire” and “Dark Empire.” Dark Horse’s stuff superceded Marvel’s stuff, while Marvel has chosen to reboot the entire comic world timeline when it got the ball back in 2015. Bantam’s stuff overrode the paperbacks of the ‘70s and ‘80s. The second wave was based on West End Games’s roleplaying game, which isn’t canon anymore either. The prequels actually made a lot of the stuff produced post 1990 inaccurate or obsolete. Various episodes of the Clone Wars freely contradicted various books and comics, much to EU fans’ annoyance. Then it was reboot time again in 2014.
All it takes is another company purchase, corporate merger, or changing of the guards within the company to open the possibility again of “rebooting” the books and comics. Someone decides the way things are going are not to that person’s liking and poof, everything changes. If book sales were to slump, the suits are going to demand changes to bring sales back up again. It’s just how it is.
So when you read these things, read them for your own enjoyment and don’t get too invested in them.