I think I've found ways to dodge the problems you describe. I am a person who is has been addiction-adjacent in my search for novelty for an absurdly long time. I've been quite devoted, however, to physical exercise very much like that described in the article for around 20 years, with favorable results. Throughout this time, I have listened to audio recordings while exercising, and it has always been my favorite aspect of the routine. But I have switched between music, audiobooks, and podcasts a few times during the 20 years, and the novelty of the various genres and topics available is enough to keep me going. For the last few years I've been doing the podcasts, and these seem to keep my interest. I've got a 32 GB mp3 player, which allows me to select from 15 or so roughly hour-long episodes of 15 or so podcasts, some of which take in a wide range of topics and most of the rest are put together by people who embody novelty in their deepest vesicles. I spend an hour or three every month or three searching out new episodes of the podcasts that continue operating and archives of old podcasts that arouse my interests. And I like doing that, too.