I wouldn't discount the possibility of one-off reunion shows in the future, provided they parted on good terms (and that's usually the case when a band has been together 20+ years)
(FWIW, I was very smug that I got a ticket to one of LCD Soundsystem's goodbye shows. It was awesome. They reunited a few years later, released albums and resumed touring ¯\_(ツ)_/¯ )