I'd imagine the concert halls and arenas will want to cut costs as much as possible after venues open up. Paper ticketing could very well be low-hanging fruit.

I don't go to many shows now but I really liked holding onto the paper ticket stub. It makes for a more romantic remembrance of a great show than a selfie or video. But progress has steamrolled over a great number of outstanding aspects of culture. Paper ticketing may be its next victim.