I honestly could see it becoming more popular due to how it could help preserve arms/allow guys to pitch at max velocity moreso than just because the Tigers have had success with it. AJ almost had to do something like this just because we had so many SP injuries in the org and didn’t really have guys who were built up to come to Detroit and give us starter innings.
If you could have a dominant guy like Skubal/Sale/Skenes/etc you’d still probably want them to go give you 7 every game and set you up for a win most of the time—-but if you have guys who are more mid-level, pitching them a couple innings every few games lets you pick the lineup situations they are facing and help put them in better opportunities for success. I think other teams will start to adopt this but more on a case by case basis with the SPs on their staffs.