I’m curious as to whether the industry will start moving from last-touch attribution to first-touch (or multi-touch) attribution instead.

The only reason last-touch (last affiliate link gets all the credit) is commonplace now is because it’s easy to implement. No need for long-term tracking. What the industry really wants is either first-touch (first affiliate link or ad you click gets the credit) or multi-touch (the payment is split between every affiliate), depending on who you ask.