I specifically didn't use DC Comics as an example because they've had multiple complete continuity reboots, and those were after continuity became so much of a train-wreck that a complete re-start was warranted.
Honestly, to me I think this will be to Star Wars what the Spellplague was to me and Forgotten Realms.
I love FR, but at the entire Spellplague thing I went "I'm out". I haven't looked at or bought a single FR product since then. If I ever run D&D, it's set before that, and acting like it never happened if continuity goes past that point (but once I did have an epic-level adventure where a Chronomancer come back warning of a dire future where most of the Gods have died, the world is ravaged and magic is all but dead and the PC's helped Mystra avoid an elaborate trap laid by Shar. . .and since the players were casual fans at best, none realized the reference.) Much like how I felt WotC trashed a beloved setting so I felt no desire to keep up with it or buy anything more, I feel much the same about Star Wars.
In my head, in my heart, the EU is still Star Wars. I'll forever look at the new Disney Continuity as an "Alternate Universe" ala the Abramsverse of Star Trek. If I run a SW RPG, it will be in the original EU.
If, big if, I'd say they could have a breaking point with continuity to give them freedom while not screwing around with too much, I'd say the Hand of Thrawn Duology (and the comic epilogue of Star Wars: Union with the wedding of Luke and Mara) would be a good ending point. The EU was never quite as good after that point. I didn't care too much for the Vong, they might have been more tolerable as a minor race instead of a huge Galaxy-wide threat that spanned a 19 book series over four years. Still, the EU as a whole was good, even if it did wear a little thin over time.