WDW History nut
Maybe they’ll reopen it when they start fixing the mess they’re currently making.From what I just read about it, it was closed from 2013-2018 before reopening with the Pixar Pier stuff. It also looks like it has some other stuff beyond just a preview for upcoming attractions.
I can't see any reason for Disney to keep operating the EPCOT Experience once everything opens -- there's nothing else to it. Maybe they'll update it whenever they decide to actually do something else to the park, though.
Or maybe not.