He’s also still getting tons of regular work outside sci-fi. He’s got a comedy with Paul Reiser coming out later this year that looks pretty funny, too.
Yeah, I've read similar that it was "just a job" from his view, but you're right: if he's offered a role and is available, he'd probably take it.
Even if he just pops up for a cameo as an Emergency Engineering Hologram or something. Maybe in Academy they find a 900 year old pattern buffer floating in deep space, and O'Brien pops out like Scotty in Relics. I would not be picky about how they bring him in, I guess, is what I'm saying. lol